Hi Michael, You may be seeing a symptom of a compiler bug described here: http://www.pgroup.com/userforum/viewtopic.php?t=913&sid=48d5377a161b94e6227cea250048ede9 According to the discussion on that forum, not using the -Mlarge_arrays option may be a solution until the bug is fixed, or perhaps it's fixed in a current version of the compiler. You should also not use the compiler option -mcmodel=medium as that evidently implies -Mlarge_arrays in versions of the PGI compiler later than 6.1 ... --Russ Russ Rew UCAR Unidata Program address@hidden http://www.unidata.ucar.edu Ticket Details =================== Ticket ID: HXZ-124728 Department: Support netCDF Priority: Normal Status: Closed