Hi all:I got the following problems on a Windows 7 x64 node.D:\\test_impi>mpiexec.exe -localonly -n 2 IMB-MPI1.exeinit command received but no process group structure found to match it: pg <>[0] PMI_Init failed: FAIL - init command received but no process group structurefount to match it.Fatal error in MPI_Init: Other MPI error, error stack:MPIR_Init_thread(645): Initialization failedMPID_Init(134).......: channel initialization failedMPID_Init(430).......: PMI_Init returned -1init command received but no process group structure found to match it: pg <>[0] PMI_Init failed: FAIL - init command received but no process group structurefount to match it.Fatal error in MPI_Init: Other MPI error, error stack:MPIR_Init_thread(645): Initialization failedMPID_Init(134).......: channel initialization failedMPID_Init(430).......: PMI_Init returned -1D:\\test_impi>

When I use -genv with I_MPI_DEBUG, the problem exists...D:\\test_impi>mpiexec.exe -genv I_MPI_DEBUG 0 -localonly -n 2 IMB-MPI1.exeinit command received but no process group structure found to match it: pg <>[0] PMI_Init failed: FAIL - init command received but no process group structurefount to match it.Fatal error in MPI_Init: Other MPI error, error stack:MPIR_Init_thread(645): Initialization failedMPID_Init(134).......: channel initialization failedMPID_Init(430).......: PMI_Init returned -1init command received but no process group structure found to match it: pg <>[0] PMI_Init failed: FAIL - init command received but no process group structurefount to match it.Fatal error in MPI_Init: Other MPI error, error stack:MPIR_Init_thread(645): Initialization failedMPID_Init(134).......: channel initialization failedMPID_Init(430).......: PMI_Init returned -1D:\\test_impi>But when I use -env with I_MPI_DEBUG, everything works fine!!!D:\\test_impi>mpiexec.exe -env I_MPI_DEBUG 0 -localonly -n 2 IMB-MPI1.exe pingpongbenchmarks to run pingpong#---------------------------------------------------# Intel MPI Benchmark Suite V3.2.3, MPI-1 part#---------------------------------------------------# Date : Wed Jul 11 17:54:46 2012# Machine : Intel 64 Family 6 Model 37 Stepping 2, GenuineIntel# Release : 6.1.7601# Version : Service Pack 1# MPI Version : 2.1# MPI Thread Environment:# New default behavior from Version 3.2 on:# the number of iterations per message size is cut down# dynamically when a certain run time (per message size sample)# is expected to be exceeded. Time limit is defined by variable# "SECS_PER_SAMPLE" (=> IMB_settings.h)# or through the flag => -time# Calling sequence was:# D:\\test_impi\\IMB-MPI1.exe pingpong# Minimum message length in bytes: 0# Maximum message length in bytes: 4194304## MPI_Datatype : MPI_BYTE# MPI_Datatype for reductions : MPI_FLOAT# MPI_Op : MPI_SUM### List of Benchmarks to run:# PingPong ...I spent some time to solve this, since the problem occurred in our customer's Notebook.Any comments are appreciated.regards,Seifer