BUG: F1001 Error or Run-time Hang with /NDdatasegment Option

An application compiled with Microsoft FORTRAN version 5.0 or 5.1 hangs and stops responding.

An attempt to build the same application with Microsoft FORTRAN versions 4.0, 4.01, or 4.1 fails and the compiler generates one of the following messages. For version 4.1: For version 4.01: For version 4.0:

The application uses the /NDdatasegment option to name its data segment, assigns a value to a two-byte integer, and writes the value to the screen.

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

• Modify the source code to remove the WRITE statement. -or-
  
  
• Modify the compiler command line to remove the /NDdatasegment option.

Microsoft has confirmed this to be a problem in FORTRAN versions 4.0, 4.01, 4.1, 5.0, and 5.1 for MS-DOS and versions 4.1, 5.0, and 5.1 for OS/2.

This is not a problem in FORTRAN PowerStation, which does not support the /ND option.

The following code example demonstrates the errors listed above. When a module does not perform any I/O operations, no errors occur and the application runs correctly.

Sample Code