VMS Help FORTRAN, Error Messages, Compilation Errors, EXTOPERAT  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  SEVERITY:  I

  MESSAGE TEXT:  Extension to FORTRAN-77:  Nonstandard operation

  EXPLANATION:  One of the following operations was detected:

   o  A logical operand and a nonlogical operand were used in the
      same operation.

   o  A real type expression and a complex type expression were used
      in the same statement.

   o  A character operand and a noncharacter operand were used in the
      same operation.

   o  A nonlogical expression was assigned to a logical variable.

   o  A noncharacter expression was assigned to a character variable.

   o  A character dummy argument appeared in a concatenation
      operation and the result of the expression was not assigned to
      a character variable.

   o  Logical operators were used with nonlogical operands.

   o  Arithmetic operators were used with nonnumeric operands.