See if there are more differences with my mpi.jam than what I put in the svn ticket It just worked for me now. MM From: k m [mailto:k.m54544@gmail.com] Sent: 05 March 2012 21:29 To: MM Cc: boost-users@lists.boost.org Subject: Re: [Boost-users] Problem building boost MPI with Visual Studio 2010 HI MM Did you try it? On Thu, Mar 1, 2012 at 7:50 PM, k m <k.m54544@gmail.com> wrote: Hi MM Thank you. Please do have a look this weekend. I want to debug it myself as well, but I am very new to bjam stuff. Please note that I was trying this on 1.48.0 instead of the 1.46.1 in the svn log that you mentioned earlier on. On Tue, Feb 28, 2012 at 4:36 PM, MM <finjulhich@gmail.com> wrote: From: k m [mailto:k.m54544@gmail.com] Sent: 27 February 2012 21:58 To: finjulhich@gmail.com Cc: boost-users@lists.boost.org Subject: Re: [Boost-users] Problem building boost MPI with Visual Studio 2010 Hi MM Thank you very much for your reply. I made the change to the c:\program files\boost_1_48_0\tools\build\v2\tools\mpi.jam file, like you mentioned (See attached, I also attached the user-config.jam for your reference). But still have exactly the same error. ----------------- Try to add ECHO statements in that function you've changed as well, that gives hints. It may be an issue with the / and \ in the windows paths. I'll take a look this weekend, MM