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</o:shapelayout></xml><![endif]--></head><body lang=HU link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear All,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> I would like to use the version 1.4.1p1 Windows x86 or x64 version. But I am having problems with it. Supposing that I write a very simple program:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><span style='font-size:10.5pt;font-family:Consolas;color:#2B91AF;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>int</span><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'> main(</span><span style='font-size:10.5pt;font-family:Consolas;color:#2B91AF;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>int</span><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'> argc, </span><span style='font-size:10.5pt;font-family:Consolas;color:darkblue;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>char</span><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>* argv[])<o:p></o:p></span></p><p class=MsoNormal style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>{ <o:p></o:p></span></p><p class=MsoNormal style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'> </span><span style='font-size:10.5pt;font-family:Consolas;color:#2B91AF;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>int</span><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'> l_iResult=MPI_Init (&argc, &argv);<o:p></o:p></span></p><p class=MsoNormal style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'> system(</span><span style='font-size:10.5pt;font-family:Consolas;color:maroon;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>"\"C:\\Windows\\notepad.exe\""</span><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>);<o:p></o:p></span></p><p class=MsoNormal style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'> MPI_Finalize();<o:p></o:p></span></p><p class=MsoNormal style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'> </span><span style='font-size:10.5pt;font-family:Consolas;color:darkblue;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>return</span><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'> </span><span style='font-size:10.5pt;font-family:Consolas;color:maroon;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>1</span><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>;<o:p></o:p></span></p><p class=MsoNormal style='line-height:13.5pt;background:#EEEEEE;vertical-align:baseline'><span style='font-size:10.5pt;font-family:Consolas;color:black;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:HU'>}</span><span style='font-size:10.5pt;font-family:Consolas;color:black;mso-fareast-language:HU'><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> It fails to execute correctly with MPICH (e.g. mpiexec –np 1 test.exe). If I launch only test.exe, it will execute correctly. However when using mpiexec, notepad does not appear (but it can be seen in the process tree). Of course the actual goal is not to start notepad.exe, but I did not succeed actually in launching any other program.<o:p></o:p></p><p class=MsoNormal> I know that in old versions of OpenMPI system() calls were not supported either, but new versions actually do support it, and in theory I think MPICH supports it as well.<o:p></o:p></p><p class=MsoNormal> I am using Visual Studio 2010 SP1 for compilation.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal> If anyone could give me a clue where the problem is, I would be grateful!<o:p></o:p></p></div></body></html>