/sys$common/syshlp/helplib.hlb FORTRAN, Error Messages, Run Time Errors, General, MIXFILACC  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  NUMBER:  31

  ERROR CODE:  F

  MESSAGE TEXT:  mixed file access modes

  EXPLANATION:  One of the following conditions occurred:

   o  An attempt was made to use both formatted and unformatted
      operations on the same unit.

   o  An attempt was made to use an invalid combination of access
      modes on a unit, such as direct and sequential.  The only valid
      combination is sequential and keyed access on a unit opened
      with ACCESS='KEYED'.

   o  An attempt was made to execute a Fortran I/O statement on a
      logical unit that was opened by a language other than Fortran.