My boost dependent applications fail to start in debug mode: error 14001. The dependency walker cannot locate the VC-8.0 runtime dlls referenced by the boost-*-vc80-mt-gd-1_34_1.dll libraries I build on my machine. That is the multi-threaded debug dll runtime: MSVCP80D.DLL, MSVCR80D.DLL. The binary distribution I got from boost.com has the same problem. This is related to the side-by-side configuration rather than making sure that the runtime dlls are in my path. A default win32 console project from VC-8.0 links fine in multi-threaded debug dll runtime mode. Also, a dll compiled in the VC-8.0 IDE referencing boost will resolve the runtime correctly but the associated boost dlls won't. Thus the dependency walker will also report unresolved runtime dlls/ I have re-installed VC-8.0 but without success. I also have VC-7.1 on my machine. Help is greatly appreciated. Best regards, Charles