Hi Rob, Yes, this is mpich-3.1.3, as downloaded from the website in the last 2 days. I was alerted to the buf_idx[] overflow by a failing assert statement, which checks for overflow when assigning values to buf_idx[]. I'm running on lustre. I can't provide my current code as a test case. I may be able to prepare something later, but I need to focus on making my code work first. These variables have type 'int', whereas something like 'size_t' or 'ADIO_Offset' might be more appropriate to store buffer offsets, where constraints are not known. Sean ----------------------- this is in the latest 3.1.3 MPICH? I thought I bumped up the size of buf_idx and related fields, though my test cases are meager at best. Do you have a test case? Which file system? ==rob ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please visit http://www.symanteccloud.com ______________________________________________________________________ _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss