FIX: F1001: ctypes.c When FORTRAN Program Contains $NOLOOPOPT (49495)


The information in this article applies to:

  • Microsoft FORTRAN compiler for OS/2 5.0
  • Microsoft FORTRAN compiler for OS/2 5.1
  • Microsoft FORTRAN Compiler for MS-DOS 5.0
  • Microsoft FORTRAN Compiler for MS-DOS 5.1
This article was previously published under Q49495

SYMPTOMS

An attempt to compile an application fails and the compiler generates one of the following messages. For FORTRAN version 5.0:
fatal error F1001: Internal Compiler Error
(compiler file '@(#)ctypes.c:1.11', line 1657)
For FORTRAN version 5.1:
fatal error F1001: Internal Compiler Error
(compiler file '@(#)ctypes.c:1.12', line 1655)

CAUSE

The application source code contains the $NOLOOPOPT metacommand.

RESOLUTION

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

  • Modify the source code to remove the $NOLOOPOPT metacommand.
  • Specify the /Od compiler option switch to suppress the optimization.

STATUS

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

MORE INFORMATION

The following code example demonstrates this problem.

Sample Code

C Compile options needed: None
$NOLOOPOPT
      END
Modification Type:MajorLast Reviewed:12/8/2003
Keywords:kbbug kbfix KB49495
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