Howdy Andy! Could you go into the nctest directory, and comment out these two lines in driver.c: ncopts &= ~NC_FATAL; /* make errors nonfatal */ ncopts &= ~NC_VERBOSE; /* turn off error messages */ Once those lines are commented out, do a make check in the nctest directory and send me the output. Hopefully it will include more information! Thanks, Ed Ticket Details =================== Ticket ID: CUY-381116 Department: Support netCDF Priority: Normal Status: Open