fortran errors

From P.M.C.Wright@ncl.ac.uk Tue Nov 26 01:47:24 1996 Subject: fortran errors I have been running NONMEM successfully for 2-3 years on an HP-UX 9000/710 system using a variety of models. Recently a run that I have been attemting to complete has finished in a very unusual way. The search progresses and minimization is successful, and then "nothing". The only other unusual aspect is that the first few lines of the outputfile are as follows. *** FORTRAN I/O ERROR 933: END (OR BEGIN) OF FILE WITH NO "END=" SPECIFIER FILE: FILE11, UNIT: 11 LAST FORMAT: ("0COVARI",...) ( 0) 0x80d12534 io_ded + 0x31c [/usr/lib/pa1.1/libcl.sl] ( 1) 0x80d15f88 read_seq_unform + 0x1c8 [/usr/lib/pa1.1/libcl.sl] ( 2) 0x80d16154 new_rc + 0x90 [/usr/lib/pa1.1/libcl.sl] ( 3) 0x80d270d8 FTN_S_RSUE + 0x158 [/usr/lib/pa1.1/libcl.sl] ( 4) 0x00040428 dat2 + 0xc68 [a.out.npmcw] ( 5) 0x0003ce04 prres + 0x28e8 [a.out.npmcw] ( 6) 0x0002790c nonmem + 0x2f8 [a.out.npmcw] This seems to be specific to one particular run that I am attempting. What am I doing wrong, can anybody help? Peter Wright Department of Anaesthesia University of Newcastle upon Tyne