Boost Compile Time

org Static analysis == tools run at compile time • “Core” static code analysis (not marine specific) clang-analyzer, Coverity scan • Compile-time dimensional analysis (“unit-safety”) Boost Units • Class-based state machines Boost Statechart, QP. More Reading. Compile Boost-Jam (you can use the 32bit version instead if you compiled it already) c : cd \ mingw \ src \ boost - jam - 3. I installed it using sudo apt-get install. It seems BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS is defined on ARM. The next and most important optimization is to. Installing boost libraries for GCC (MinGW) on Windows - boost-windows. My project links against parts of Boost library (headers only), Qt libs are dynamically linked and I have only one main cpp file. However, it is essential to keep your project compile time under control or your team productivity will be negatively impacted. Remove unnecessary states and links by merging the same states. In that list, GCC 4. Do you have some older files of boost installed while trying to compil with 1. DI reduces boilerplate code (See Create Objects Tree) [Boost]. 100% Guaranteed! - Speedy PC Pro 7. hpp" resides), is specified in a "-I" option at compile time. Managing resources will become a piece of cake. The set of compile-time options that must be passed into the code generators can vary from one release of SQLite to the next, but at the time of this writing (circa SQLite 3. Metaparse - Compile-time parser library, producing types, values, and metafunctions from compile-time strings Boost. You should see the C and D for then. Only need is to include the proper boost header. A new C compiler "Chameleon" for PIC16 and PIC16 added to SourceBoost installation. No compile of any of the boost libraries is necessary. I have a an existing C++ DLL that uses Boost Libraria Version boost_1_35_0. The correct approach would have been to ensure that the *parent* of the "boost" directory, (where "boost/config. template // A specialisation used if the expression is true. asio in C + + Visual Studio 2005 (Windows XP). In contrast, while Boost. The new C++ standard supports variadic templates but there is no type list implementation as you see in the boost or loki library, so I implement a little helper which does this job. Improved compiler speed (about 3 times), added IP library (IP,UDP,DHCP,ARP,UDP sockets) and other improvements. It's aimed at performance, both at compile-time and at runtime and uses recent features of modern C++. Do you think multithreading is a burden?. The main difference between Metaparse and Boost. LIBRARY_PATH Additional paths that gcc searches for libraries at link time (lib or lib64). 1 along with boost libraries (especially boost::asio), on Windows 7 with Visual Studio 2010. DI gives better control of what and how is created (See Constructible Policy) [Boost]. Peter Dimov wrote: > I think that a compile-time port of boost. Computing a hash function in compile-time with Boost. These asserts can be used to do compile time validations and are very effectively used in the. C++11 also includes several more Boost libraries in addition to those from TR1. Only need is to include the proper boost header. In short, a Polymorphic Function Object is a Function Object which can be used with Boost. Generally, D has more space than C has obviously suggest you utilize that. Compile time optimisations - Technical Rseding91 explained in the FFF-201 how important it is for us to not only optimize the game for you the players, but also for us, so we can speed up our change->compile->run/test cycle. Introduction. Because of this, I'm a bit limited in the amount of places where I can test my code. The boost::math::static_gcd and boost::math::static_lcm class templates take two value-based template parameters of the static_gcd_type type and inherit from the type boost:: mpl:: integral_c. Traits are (I repeat) associating information with a compile-time entity. Hi all, I found a way to make CT strings in C++14, with the help of generic lambda. You do have to be wary that too much of this kind of thing can make the compiler run a long time, use up space to store the precalculated values, and obfuscate your code, among other downsides. You'll now see all of the partitions that currently own. Peter, this is totally cool! The absence of full-fledged compile-time bind. I first saw this (or was it a Fibonacci?) quite a long time ago (probably about 15 years?). boost:: make_variant_over was fixed and now works with views and other Forward Sequences (thanks to Mikhail Maksimov for the fix) #8554, #10041, PR#35. It is important to note that make_tuple and get are evaluated at compile time, not at runtime. A Simple Makefile Tutorial. Initializing Dictionary. cmake and stores the result in cache entry "Boost_DIR". Because the goal of such library is to render compile-time (type system) failures. It uses the static_rational template meta-class, but this is a rather painful exercise considering the variety of compiler-specific code customization. That's when I suddenly ran into compile-time errors that I do not understand. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. In reply to: David Abrahams: "Re: [boost] Compile-time print" Next in thread: David Abrahams: "Re: [boost] Compile-time print" Reply: David Abrahams: "Re: [boost] Compile-time print". I was able to cut 1/3 of the compilation time by replacing all uses of boost::signals2 by a more lightweight library. I have a feeling recursion slows down the compile time, I will attempt an iteration based version eventually and see. You'll see what kind of work can be done at compile time and what. To limit the complexity of compile-time constant computations, and their potential impacts on compilation time, the C++14 standard requires the types in constant expressions to be literal types. A large part of Boost is provided as C++ template\ code which is resolved entirely at compile-time without\ linking. You will learn to convert data such as string to numbers, numbers to string, numbers to numbers and more. If Boost was built using the boost-cmake project it provides a package configuration file for use with find_package's Config mode. You are correct that the compiler is a 32-bit program, and is limited to a 4Gb address space at compile time. Sometimes a long gap occurs between the time a query is placed in cache and the time SQL Server executes it—in some cases, minutes or hours after the optimizer creates the plan. The compile-time cost of implicits and mixins. GotW #7b Solution: Minimizing Compile-Time Dependencies, Part 2 Herb Sutter GotW 2013-12-31 2014-01-03 7 Minutes Now that the unnecessary headers have been removed, it’s time for Phase 2: How can you limit dependencies on the internals of a class?. Since message has to be a string literal, it cannot contain dynamic information or even a constant expression that is not a string literal itself. Boost Spirit X3 is a completely revamped version of Boost Spirit X3. To my surprise my flat_map compiles more slowly than boost::flat_map when I instantiate the boost::flat_map unit test. Hi, Is there any interest in a C++03/C++11/C++14 header only, type safe, library providing compile time, macro free *constructor. Its origin is in boost. Cleanup (to prepare the directory for a fresh run, e. Well i dont know how this should work (if VB can use that variable, etc) then i will tell you how to manually add the boost headers and libraries. Managing resources will become a piece of cake. I want to include the path of the lib in my Qt project. ★★ Runtime Error Vs Compile Time Error ::Boost PC Speed in 3 Easy Steps. Compile and Execute C++11 Online. A compile-time constant is a value that can be (and is) computed at compile-time. Hello everyone, I have to use the library Boost. BOOST_UBLAS_USE_FAST_SAME Debug mode BOOST_UBLAS_CHECK_ENABLE Enable checking of indexs, iterators and parameters. ) in a publication or collection computers : to change (computer programming instructions) into a form the computer can understand and use. 100% Guaranteed! - Registry Fix To. Many of Boost's founders are on the C++ standard committee and several Boost libraries have been accepted for incorporation into the Technical Report 1 of C++0x. 1, my project consist of 120 PBL\'S and images are on a network drive. You can pass two parameters of type boost::gregorian::date, one for the beginning date and one for the end date. Boost and C++Builder in the Future. Thus, incorrect usage of downcast constructs will lead to bugs detectable only at run-time. How to create a new GUID. Using const encourages the compiler to do the calculation at compile time and forces the type of the result to uint8_t. Hi, I'm upgrading some code from boost 1. In later versions, the compiler replaced the interpreter to boost VI run-time performance, which is a common differentiator for compilers relative to interpreters. Libraries such as Boost. Since metaprogramming operates on type lists, which can only hold types, it's convenient to represent compile-time constants as types. The set of compile-time options that must be passed into the code generators can vary from one release of SQLite to the next, but at the time of this writing (circa SQLite 3. In contrast, while Boost. ASAP (As Static As Possible) describes a compile-time automatic memory management system using whole program analysis. Note: This library is not part of the official Boost C++ libraries. This encouraged me to find other big compile time sinks. When a Struct is defined through the BOOST_HANA_DEFINE_STRUCT macro, the key associated to any member is a compile-time hana::string representing the name of that member. ) I recently had to use C++14's std::is_final but wanted to downgrade to boost::is_final if the former was not available. Is there really a performance boost for Linux games? Yes, there is. Building Boost 1. So, here are a few samples from when I did remember. Most of the libraries are licensed under the Boost Software License, designed to allow Boost to be used with both open and closed source projects. grepping is taking too long :( I found the includes in /usr/include/boost. If Boost was built using the boost-cmake project it provides a package configuration file for use with find_package's Config mode. 79 Using map function 0. 1, my project consist of 120 PBL\'S and images are on a network drive. Fusion (both of which are also supported) Boost. by Louis Dionne for Boost C++ Libraries The goal of this project is to improve the compile-time associative data structures present in the Hana C++14 metaprogramming library. The result of a program written in that language is another C++ program, which in this case is invalid and thus causes the compiler to give away selected. It's not compatible with Boost Spirit Qi, so you'll most likely have to rewrite a lot of stuff, in the parser, in the Abstract Syntax Tree (AST) and in the AST passes as well. 2 as the normal compiler in development/test and then in the QA staging switch to COBOL 6 with OPT(1) before final test where it all gets tested again. Generally, D has more space than C has and so i suggest you utilize that. To Compile or Not To Compile I am currently in the middle of a way-overdue refactoring of MhtBuilder , which uses regular expressions extensively. A right PC optimizer. tagged -- Names of boost binaries include the encoded build properties such as variant and threading, but do not including compiler name and version, or Boost version. At the time I originally wrote this I was using a 100MHz Pentium running BSDI. On OS X, this is called DYLD_LIBRARY_PATH. DI gives better understanding about objects hierarchy (See UML Dumper) Try it online! [Boost]. If you run the same program more. Most of the libraries are licensed under the Boost Software License, designed to allow Boost to be used with both open and closed source projects. What I'm concerned of is compilation time - my current version takes about 30 minutes to compile on gcc 3. No fruit Baidu, but my colleagues compiled and no reported this error, so doubt their own system problem, so the open XP system in virtual machine, findings suggest a need to add the compiler in the bootstrap. Check version log for. Since exp(1. We will present how different use cases for compile-time programming will be solved in C++20, and how even more use cases can be unlocked in the future. I have a an existing C++ DLL that uses Boost Libraria Version boost_1_35_0. (See also result_of tutorial. C++ Shell, 2014-2015. Example of UUID generation using Boost in C++. You'll now see all of the partitions that currently own. 4x and compile time reduction by 5. That's when I suddenly ran into compile-time errors that I do not understand. This tutorial will guide you through the process of creating and developing a simple CMake project. So how do we organize unit tests with Boost. After completing this procedure you will have Boost's libraries in x86 and x64 variants, at the same time. Active 4 years, 11 months ago. Forms at compile time of the type of data the binding is going to be using. In 1999, SGI added concept checkers to their implementation of the STL: code which checked the template parameters of instantiated pieces of the STL, in order to insure that the parameters being used met the requirements of the standard. MPL provide a large collection of metafunctions and compile-time data structures to simplify C++ template metaprogramming. Improved compile-time associative data structures for Hana. Can someone. A compiler has the whole lifetime of the identifier in its grasp when processing that scope, and can propagate the allocation info as as semantic attribute tied to the syntax. I was able to cut 1/3 of the compilation time by replacing all uses of boost::signals2 by a more lightweight library. Turbo Boost the speed of FPGA compiles under Windows (Method included!) Status: New Submitted by ToeCutter on ‎03-21-2014 06:43 PM 10 Comments (10 New) User Lorn has found a brilliant tip for *DRASTICALLY* speeding up FPGA compile times under Windows for PCs with the turbo boost feature. Parsing strings at compile-time — Part I Posted on May 11, 2011 by Andrzej Krzemieński In this post we will examine how constant expressions can be used to implement compile-time string parsing. Basic usage. I called it a "compile time" function with compile-time arguments. Indexing is a very nice feature for every day usage of your system, Using junction links with SSD. Use this option during development when you are focused on solving logic errors and need a fast compile time. Boost Application Development Cookbook, Second Edition. I will probably leave COBOL 4. The boost::math::static_gcd and boost::math::static_lcm class templates take two value-based template parameters of the static_gcd_type type and inherit from the type boost:: mpl:: integral_c. Better global fixtures mechanism, and spitting of responsibilities with BOOST_TEST_GLOBAL_FIXTURE for global fixtures and BOOST_TEST_GLOBAL_CONFIGURATION for global initialization (compile time configuration). a link libraries) of a target are just another property and are defined in an INTERFACE or PRIVATE scope. Cookies gather information in anonymous form, including the number of visitors to the site, where visitors came from. In the latter case the size is fixed at compile-time but the multidim shape is not and there is partial compile-time size verification. 1 // 2 // Copyright (c) Antony Polukhin, 2012-2014. Peter, this is totally cool! The absence of full-fledged compile-time bind. Boost Binaries For Windows. ResultOf is an MPL Metafunction to extract function return types without the help of C++0x decltype, which enables you to do the functional programming in C++03. Unlike Boost, due to the requirement for a modern C++ compiler, all the. FYI, Ábel Sinkovics has presented a c++11 CT string in his mpllibs::metaparse[1] lib. The problem is that the # preprocessor symbol is only recognized when it's used like this: #define symbol(X) #X. [RUNTIME ERROR VS COMPILE TIME ERROR] Free Download. 6 20120305 (Red Hat 4. Parsing strings at compile-time — Part I Posted on May 11, 2011 by Andrzej Krzemieński In this post we will examine how constant expressions can be used to implement compile-time string parsing. ★★ Runtime Error Vs Compile Time Error ::Boost PC Speed in 3 Easy Steps. exe, Make sure you use the correct path). Since exp(1. Do you: want to try out C++, but don't have a compiler installed? want to try out a C++11 feature your. All that means though is that you can benefit from the reduced compile time more quickly. Units in odeint take up to 4 GB of memory at compilation. Proto - A library for building expression template-backed EDSLs CoMeta - Lightweight, header-only C++14 metaprogramming library visit_struct - A miniature reflection library, providing structure visitors for C++11. cmake or boost-config. Here is a bug report on the boost site:. It has been in development since 2006 and provides a cross platform way of spawning child processes and communication through synchronous or asynchronous streams. You will learn to convert data such as string to numbers, numbers to string, numbers to numbers and more. Python binding project, reported a binary size reduction of 5. We’ll see what kind of work can be done at compile time and what Boost containers can do. compile-time constant; if true, the range on which the random numbers are uniformly distributed is known at compile-time and members min_value and max_value exist. struct enable_if {}; // Doesn't define "type", substitution will fail if you try to access it. I placed the whole project on RAM Disk but speed improved only by 1 sec. This is because fixed_string stores the text as subobjects (like an array) and not as template parameters. Forms at compile time of the type of data the binding is going to be using. mpl or Boost. you can use boost but where’s the fun in that? We’re trying to write code that will run at compile time, and first we. Hana static if_,. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. It is a superset of Boost. An introduction to C++'s SFINAE concept: compile-time introspection of a class member. It's fast, free and 95% backward compatible with BoostC compiler. In the low-profile mode some features (like object descriptions, enumeration value names, some file and line info atached to exceptions, etc. To compile stream, you have to use –std=c99 option. If you remove the checkmark next to Prompt to select a compile server for each compilation, the Select Compile Server window no longer appears each time you begin a compile. Peter Dimov wrote: > I think that a compile-time port of boost. Subscribe Building Boost 32-bit and 64-bit libraries on Windows 08 February 2017. Compile Time Checks Also known as concept checking. cmake and stores the result in cache entry "Boost_DIR". The answer to your question is yes my OS is supported under that version of Boost. After reading C++ Crash Course, you’ll be proficient in the core language concepts, the C++ Standard Library, and the Boost Libraries. Join the many wildly-successful game studios that already use Visual Studio to boost your productivity with Visual Studio 2019 and the world-class debugger. The results really. Proto parsers work. Boost Binaries For Windows. On OS X, this is called DYLD_LIBRARY_PATH. Generally, D has more space than C has and so i suggest you utilize that. Maybe you can also have a try to use Boost UUID, more about using Boost UUID please refer to link below. ★★ Runtime Error Vs Compile Time Error ::Boost PC Speed in 3 Easy Steps. xml before runnig boostrap The line is x86_64 I hope this helps. This package aims to provide the most useful subset\ of Boost libraries for template use among CRAN package. org) offers C++ programmers another way to do compile-time assertions in the form of a macro called BOOST_STATIC_ASSERT. We’re happy to say that we have fixed over 750 Connect feedback bugs in Visual Studio 2015 RTM since its first CTP release middle of last year. After reading C++ Crash Course, you'll be proficient in the core language concepts, the C++ Standard Library, and the Boost Libraries. Hi, I use Powerbuilder 11. But I also need to know the library path. The benefit over a more traditional length-n vector is that the loops can be unrolled, resulting in very optimized code. Forms App Startup Time. This encouraged me to find other big compile time sinks. How each of these can improve the compile time? HD/SSD - Getting an SSD instead of an HDD will drastically improve the read/write speed, I'm not sure how this would improve the compile time, but in theory, it would improve the "Saving Project/Loading Project" time. // (C) Copyright David Abrahams 2002 - 2003. 100% Guaranteed! - Change Registry. Many of Boost's founders are on the C++ standard committee and several Boost libraries have been accepted for incorporation into the Technical Report 1 of C++0x. The library has now more than 100 functions but each C++ standard adds new ones. Formany C++ developers, Boost is as much a part of the C++ environment ascore language features like the STL itself, so it’s important forreal-time developers to also consider which Boost classes might beappropriate for real-time applications. Boost Spirit X3 is a completely revamped version of Boost Spirit X3. Contribute to boost-experimental/di development by creating an account on GitHub. Instantly navigate to a symbol's declaration or context. Using all available cores will give you an extra boost without too much Optimizing hard drive. Compile-time checking the existence of a class template (Updated after a suggestion from bluescarni. Many of the compile-time options effect this generated code and must be supplied to the code generators before the amalgamation is assembled. This tutorial does not even scratch the surface of what is possible using make, but is intended as a starters guide so that you can quickly and easily create your own makefiles for small to medium-sized projects. Compile-time string concatenation, under the current language limitations (C++11 and C++14), does not scale well due to the overwhelming template instantiation depths (O(N^2) or type-traits invocations) that it entails. Build, the command-line program bjam is used. Do not use this option for shipping your executable. 6-4), I would say that my compiler is also supported by that version of Boost. Makefiles are a simple way to organize code compilation. Calendar Dates. Template Metaprogramming: Compile time loops over class methods. A right PC optimizer. To Compile or Not To Compile I am currently in the middle of a way-overdue refactoring of MhtBuilder , which uses regular expressions extensively. DI reduces boilerplate code (See Create Objects Tree) [Boost]. So, basically it helps us to return multiple values from a function. When the compiler executables for C and C++ are different, the path to the C++ compiler executable must be specified. We use cookies for various purposes including analytics. poorly compile­time and link­time compared to fixed_string. I fixed this problem by deleting line 21 in volk/gen/archs. The results really. What are Compiled Bindings? A compiled binding is a way of telling Xamarin. I placed the whole project on RAM Disk but speed improved only by 1 sec. Managing resources will become a piece of cake. After reading C++ Crash Course, you’ll be proficient in the core language concepts, the C++ Standard Library, and the Boost Libraries. you can use boost but where’s the fun in that? We’re trying to write code that will run at compile time, and first we. The primary highlight here is the compile time. if you wish to have a solution that works with the Boost. Using all available cores will give you an extra boost without too much Optimizing hard drive. exe, Make sure you use the correct path). In this chapter, we will cover the following:Checking sizes at compile timeEnabling function template usage for integral typesDisabling function template usage This website uses cookies to ensure you get the best experience on our website. The class boost::posix_time::ptime is the primary interface for time point manipulation. The problem is that the # preprocessor symbol is only recognized when it's used like this: #define symbol(X) #X. ! Constexpr! This is another feature specific to C++11 and 14. If Boost was built using the boost-cmake project it provides a package configuration file for use with find_package's Config mode. Forking new threads or sub-processes incurs a good deal of overhead in the OS. I got the following times for converting the list of words in /usr/share/dict/words (38,470 words at that time) to upper case: Version Time (seconds) Basic loop 3. The library is similar to Spirit, however while parsers built with Spirit parse at run-time, parsers built with Metaparse parse at compile-time. This is a quick glance at C++ compiler front-end bugs resolved that were reported on the Microsoft Connect portal. You would use it in the following way:. New versions of this library are released regularly. It is impossible to catch all errors at compile time and often not affordable to catch all remaining errors at run time. These are called static or compile-time asserts. Now I am unable to find my boost lib file on my filesystem. When using Boost with those defines setup, the interface will become incompatible, because it was built with a different set of defines. Commenting out not necessary tests, or do something similar, isn't a good idea — that's why Boost. The struct Schema has the following members: base. It's not supposed to be defined. However, most of these casts are statically eliminated by the JIT compiler. A developer may be working on platforms where compiler support for the advanced C++ techniques leveraged by Boost are not well supported, such that the Boost code doesn't compile at all or performs quite poorly. 1 along with boost libraries (especially boost::asio), on Windows 7 with Visual Studio 2010. Proto parsers work. cpp, and other times, it's mostly after. The problem is that the # preprocessor symbol is only recognized when it's used like this: #define symbol(X) #X. If you cannot find a prebuilt Boost library matching your Visual Studio then you might have to build Boost by yourself. Although Boost was begun by members. DI gives better understanding about objects hierarchy (See UML Dumper) Try it online! [Boost]. You should see the C and D for then. Do you think multithreading is a burden?. if you wish to have a solution that works with the Boost. - Kaz Feb 13 '13 at 17:15. The class boost::posix_time::ptime is the primary interface for time point manipulation. If you don't know how to install Boost here is a quick guide for Windows with Visual Studio. The main issue with Boost. I have caching of baked assets and hot asset reloading working and all. std::integral_constant is a standard C++11 type that wraps an integral constant (that is, a compile-time constant integer value) into a type. When I compile the boost’s flat_tree test with boost::flat_map it takes 17 seconds, compared to 18 seconds for my flat_map. cpp into the executable app. You would use it in the following way:. Compile-time option enabling the low-profile mode. Compute the CRC32 table at compile-time [closed] Ask Question Asked 8 years, 1 month ago. 38, and upgrading compilers from gcc 4. Calculate Fibonacci At C++ Compile Time - C++ Template metaprogramming May 2, 2015 by nasacj · 0 Comments I was asked a question about calculate the Fibonacci number at the compile time not at run time in C++. The project files provided are already configured to use the Intel® compiler. variant, the types would be compiled within the Boost component. poorly compile­time and link­time compared to fixed_string. To limit the complexity of compile-time constant computations, and their potential impacts on compilation time, the C++14 standard requires the types in constant expressions to be literal types. // Use, modification and distribution. struct enable_if {}; // Doesn't define "type", substitution will fail if you try to access it. While Hot-reload definitely helps and is a huge step forward from the UDK days, it's not quite enough. You do have to be wary that too much of this kind of thing can make the compiler run a long time, use up space to store the precalculated values, and obfuscate your code, among other downsides. But when I mix Qt and boost the "moc" process as well as the compilation of each file (the files which are independent of boost also)takes lot of time. org) offers C++ programmers another way to do compile-time assertions in the form of a macro called BOOST_STATIC_ASSERT. If you have Boost installed, generating. The well-known Boost library actually makes the effort to provide such compile-time rational numbers and unit dimension checks in the boost::units module 1. The restriction on these functions is that they may only consist of one statement (though additional lines with typedefs, static_assert, etc are OK), and this statement may only call other constexpr functions. We’ll see what kind of work can be done at compile time and what Boost containers can do. x contains many additional optimizations to increase throughput and scalability. Using const encourages the compiler to do the calculation at compile time and forces the type of the result to uint8_t. 100% Guaranteed! - Javascript Error 45. These are called static or compile-time asserts. with another version of the compiler), is done as follows:. I have a feeling recursion slows down the compile time, I will attempt an iteration based version eventually and see. The result of a program written in that language is another C++ program, which in this case is invalid and thus causes the compiler to give away selected. At this time we do no need any of the new stuff in COBOL 5/6 it would just be nice to get a performance boost for "free" !. C++ allows compile time counters (i. In the compile-time world, the predicate is a structure (or class), not a function or function object. In this tutorial, you'll have a small and fast introduction to HTTP (if you're already familiar with HTTP, you can skip the associated section and it's more likely you'll deeply understand Boost. About C++ Crash Course A fast-paced, thorough introduction to modern C++ written for experienced programmers. Sometimes a long gap occurs between the time a query is placed in cache and the time SQL Server executes it—in some cases, minutes or hours after the optimizer creates the plan. [RUNTIME ERROR VS COMPILE TIME ERROR] Free Download.