Hi there, I am rather new to Boost and this is my first trouble (win32 debug): I am using Boost::Thread inside a DLL which is loaded by my main program via LoadLibrary(..), but doing so leads to a "Debug Assertion" in "dllinit.cpp" (only in debug configuration!). my DLL links with: #pragma comment( lib, "libboost_thread-vc80-mt-gdp-1_37" ) #pragma comment( lib, "libboost_date_time-vc80-mt-gdp-1_37" ) #pragma comment( lib, "stlportstld.5.0" ) with preprocessor defines: _STLP_DEBUG BOOST_ALL_DYN_LINK BOOST_THREAD_USE_DLL BOOST_LIB_DIAGNOSTIC I am using STLport 5.0.1 and I have boost compiled successfully against STLport (at least I hope so..), I am not using pthreads. No release/debug DLL mixups, all DLLs are available (I checked with the dependency walker). The only thing that bugs me is that there is no "libboost_thread-vc80-mt-gdp-1_37.DLL" generated during boost-build.. but honestly I havent the smallest clue whats going wrong.. Hopefully anyone of you can help me out.. thank a lot in advance and greetings, Michael