[mpich-discuss] Problems with conversion from 32-bit to 64-bit

[Hiatt, Dave M]

We are using Windows 7, MS Visual Studio 2008, and MPICH2 1.2.1, we build both the Win32 and x64 versions from the same projects.  We have some machines with Win32 MPI and some with x64, both work as advertised.  

I would suggest based on your descriptions to look for some obvious things.

Remember that the x64 build puts the Debug and Release in x64\Debug and x64\Release instead of just Release and Debug.  It might just be as simple as not having and up to date copy procedure to where you execute from.

Also remember to restart the smpd for the x64 version.  I'd look for things like that.  We found it went very smoothly and works fine, so the underlying components work just fine, I can tell you that.

-----Original Message-----
From: mpich-discuss-bounces at mcs.anl.gov [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Euan Barlow
Sent: Tuesday, June 01, 2010 10:32 AM
To: mpich-discuss at mcs.anl.gov
Subject: [mpich-discuss] Problems with conversion from 32-bit to 64-bit

Hello,

I have been using the latest version of MPICH2 on a 32-bit windows OS with MS visual studio 2008 and I have recently converted to a 64-bit machine.

If I download the 32-bit version of MPICH2 my code successfully executes as before; however, if I then uninstall the 32-bit version and install the 64-bit version I can't get the same code to execute. The error message produced is:

"launch failed: CreateProcess(test_parallel_3.exe) on 'machine_name' failed, error 14001 - The application has failed to start because its side-by-side configuration is incorrect..."

As far as I can tell, mpiexec and smpd are both installed and working correctly. I think the problem is with Visual Studio. I have used the configuration manager to set the active solution platform to "x64" with the active solution configuration as "debug", but this doesn't seem to help. Has anyone else experienced this problem?

I would appreciate any help/advice.

Many Thanks

Euan


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