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

  NUMBER:  21

  ERROR CODE:  F

  MESSAGE TEXT:  duplicate file specifications

  EXPLANATION:  Multiple attempts were made to specify file
  attributes without an intervening close operation.  One of the
  following conditions occurred:

   o  A DEFINE FILE was followed by another DEFINE FILE statement.

   o  A DEFINE FILE was followed by an OPEN statement.

   o  A CALL ASSIGN or CALL FDBSET was followed by an OPEN statement.