Regarding LFS API calls to enable file sizes > 2 GB: My question is: using g77, should we apply the same flags as in gcc (-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE) and recompile, or would the flags be different? A bunch of old grotty science code is still in FORTRAN(77), and we've got people running into file size limits with these codes now. The systems have ext3 and LFS support, but the output files from the FORTRAN code end at ~<2 GB. Scott Delinger scott.delinger@xxxxxxxxxxx IT Administrator http://www.chem.ualberta.ca/~scott Dept of Chemistry, University of Alberta Edmonton, Alberta, Canada T6G 2G2