Error in parallel nonmem - related to file size?

Dear NMusers (and Bob). I'm getting an error running parallel NONMEM, with MPI. It seems that perhaps the file size is limited to ~10,000 lines, the error I'm getting is: forrtl: severe (24): end-of-file during read, unit 10, file c:\xxxxxxx\WK1_FILE10. Setting NREC = 10001 works, setting NREC = 10002 gives the above error. Doesn't seem related to the size of the file, just the number of records.? Perhaps this is related to the 4 digits assigned for the length of the data file in FCON (but then why 10001, not 10000)? Anyone know of a work-around? thanks Mark Mark Sale M.D. Vice President, Modeling and Simulation Nuventra, Inc. (tm) 2525 Meridian Parkway, Suite 280 Research Triangle Park, NC 27713 Office (919)-973-0383 msale_at_nuventra.com<msale_at_kinetigen.com> http://www.nuventra.com ?