Re: Possible Error (with Fix?) in debug build of thread(?) library created with msvc/stlport.

What do mean by failed? Doesn't compile? Link? or Run?

Answer. It Compiles(even when the arg list is wrong!) ,Links & Runs but outputs 0 instead of 3. It links with the following warning LINK : warning LNK4098: defaultlib "LIBCMT" conflicts.... but this warning can be remove in one of two ways. 1. Comment out the <iostream> header & std::cout call Stepping through the code you can see that NUM_CLIENTS is 0 2. Using the "ignore LIBCMT" link setting SUGGESTION Perhaps the build of all the boost with stlport libraries just use the settings defined in stl_user_config.h The default installation of stlport 4.5.3 for _STLP_PORT is as follows: // #define _STLP_DEBUG 1