PRB: L2029 "Unresolved External" Errors Linking FORTRAN App

 Last reviewed: July 18, 1995
Article ID: Q31577
The information in this article applies to:
  • Microsoft FORTRAN for MS-DOS, versions 4.0, 4.01, 4.1, 5.0, 5.1
  • Microsoft FORTRAN for OS/2, versions 4.1, 5.0, 5.1
  • Microsoft FORTRAN PowerStation for MS-DOS, versions 1.0 and 1.0a

SYMPTOMS

During the process of linking an application, the linker generates a number of error messages of the following form: 

   error L2029: '_name' unresolved external

CAUSE

There are three main causes for this error:

  • The FORTRAN libraries were built with C compatibility support and the C libraries are not linked with the application. The C- compatible FORTRAN libraries do not contain the routines common to both C and FORTRAN.

    -or-

  • The version of the linker is not correct.

    -or-

  • A terminate-and-stay-resident (TSR) program interferes with the linking process.

RESOLUTION

The corresponding resolutions are as follows:

  • Link the application with both the C libraries and FORTRAN libraries.
  • Ensure that the latest version of the linker is installed.
  • Modify the AUTOEXEC.BAT file to remove all unnecessary TSR programs.

Additional reference words: 1.00 4.00 4.01 4.10 5.00 5.10
KBCategory: kbtool kbprb
KBSubcategory: TlsMisc

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Last reviewed: July 18, 1995
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