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

  SEVERITY:  I

  MESSAGE TEXT:  Extension to FORTRAN-77:  Logical expression
  required

  EXPLANATION:  One of the following syntax extensions was detected:

   o  A numeric expression was used in a logical IF statement.

   o  A numeric expression was used in a block IF statement.

   o  A value other than .TRUE.  or .FALSE.  was assigned to a
      logical variable.

   o  A logical variable was initialized with a nonlogical value by
      means of a DATA statement.