Q67615: FIX: Protection Violation When Structure Element Used in OPEN

Article: Q67615
Product(s): Microsoft Fortran Compiler
Version(s): 5.0
Operating System(s): 
Keyword(s): 
Last Modified: 04-MAY-2001

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The information in this article applies to:

- Microsoft FORTRAN compiler for OS/2, version 5.0 
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SYMPTOMS
========

An attempt to compile an application fails and the compiler generates a
protection violation.

CAUSE
=====

The application uses an element of a structure as the filename in an OPEN
statement.

RESOLUTION
==========

To work around this problem, perform one of the following two steps:

- Modify the source code to assign the value of the structure member to a
  temporary variable and specify the variable in the OPEN statement.

- Compile the application in MS-DOS.

STATUS
======

Microsoft has confirmed this to be a problem in the FORTRAN version 5.0 for
MS-DOS and OS/2. This problem was corrected in FORTRAN version 5.1 for MS-DOS
and OS/2.

MORE INFORMATION
================

The code example below demonstrates this problem.

Sample Code #1
--------------

  C Compile options needed: None

        PROGRAM TEST
        STRUCTURE /IO/ 
          CHARACTER*12 NAME
        END STRUCTURE
        RECORD /IO/ IOINST
        IOINST.NAME = 'TEST.DAT'
        OPEN (10, FILE = IOINST.NAME)
        END

The code example below alleviates this problem by using the temporary variable
TMP to hold the filename.

Sample Code #2
--------------

  C Compile options needed: None

        PROGRAM TEST
        STRUCTURE /IO/ 
          CHARACTER*12 NAME
        END STRUCTURE
        CHARACTER*12 TMP
        RECORD /IO/ IOINST
        IOINST.NAME = 'TEST.DAT'
        TMP = IOINST.NAME
        OPEN (10, FILE = TMP)
        END

Additional query words: 5.00 buglist5.00 fixlist5.10

======================================================================
Keywords          :  
Technology        : kbAudDeveloper kbFortranSearch kbZNotKeyword3 kbFORTRAN500OS2
Version           : :5.0
Issue type        : kbbug
Solution Type     : kbfix

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