hello, I am trying to compile a simple proragm with the thread headers included and the clr option in VS2005 When i include the thread headers and set the to compile with the /clr option the app will not execute and give the error below: "The application failed to initialize properly (0xc000007b). Click on OK to terminate the application." this sample program works fine without the clr option, however I am writing a managed c++ app that needs this option on. also I have used the lib installer from http://www.boost-consulting.com/products/free the 1.34.1 installer for vs8.0, I have selected all options and still does not work. I have tried defining BOOST_THREAD_USE_DLL and BOOST_THREAD_USE_LIB, still fails. BOOST_THREAD_USE_LIB error message is the same as if I did not have this define. BOOST_THREAD_USE_DLL error message: "This application has failed to start because boost_threads-vc80-mt-gd-1_34_1.dll was not found. Re-Installing the application may fix this problem." my project prefs have the following settings: c/c++ - additional include directories= "C:\Program Files\Boost\boost_1_34_1\" linker - additional include directories= "C:\Program Files\Boost\boost_1_34_1\lib" [code] #include "stdafx.h" #include <iostream> #include //#define BOOST_THREAD_USE_DLL //#define BOOST_THREAD_USE_LIB #include #include int main(int argc, char* argv[]) { boost::xtime expiration; boost::timer the_timer; //starts the timer std::cout<<"Welcome to the sample program!"<>buff; } [/code] Jason McGuidwin Gnostech Inc. San Diego, Ca