HP 3000 Manuals HP 3000 Manuals
I/O Run-Time Errors During the execution of a FORTRAN 77 program, error messages may be printed on the output unit by the input/output library supplied for FORTRAN programs. The error message and a complete listing of run-time errors returned in the IOSTAT variable or printed on the output unit are listed in Appendix A . If the IOSTAT and ERR specifiers are present, or the END specifier, or all three, the I/O error number is stored in the IOSTAT variable and control transfers to the ERR label, where a user routine can decode and handle the error if desired. Range checking errors (when the RANGE directive is ON) in arguments to input/output statements occur outside the input/output system and are handled as fatal out-of-range errors; they are not trapped by the IOSTAT and ERR specifiers.