Hi, I try to use MPE logging on my mpi program on Windows. It works fine on the cpi example. I have only linked my program with mpe.lib and run on a single machine with -localonly -log options. I use dynamic process via MPI_Spawn. The program crashed on MPI_Intercomm_merge with the log ------------------------------------------------------- .\src\logging\src\clog_commset.c:CLOG_CommSet_get_IDs() - PMPI_Comm_get_attr() fails! Backtrace of the callstack at rank 0: unable to read the cmd header on the pmi context, Error = -1 I really appreciate any help Bruno _________________________________________________________________________________________________________________________ Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration, France Telecom - Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci. This message and its attachments may contain confidential or privileged information that may be protected by law; they should not be distributed, used or copied without authorisation. If you have received this email in error, please notify the sender and delete this message and its attachments. As emails may be altered, France Telecom - Orange is not liable for messages that have been modified, changed or falsified. Thank you.