Help is available for various system error codes. Use the following as a guide in finding help on a particular class of error codes: HELP F4P ERRORS help on Fortran IV-Plus errors HELP FCS ERRORS help on Files-11 (FCS) errors HELP RMS ERRORS help on Files-11 (RMS) errors HELP EXEC ERRORS help on executive directive errors The following manuals contain detailed error descriptions on the above. F4P -- Fortran Programmer's Guide FCS -- I/O Drivers or I/O Operations Reference Manuals RMS -- RMS-11 User's Guide EXEC - Executive Reference Manual