PRB: LINK Error L2022: Export Undefined

The information in this article applies to:

• Microsoft Windows Software Development Kit (SDK) for Windows versions 3.1 and 3.0

SYMPTOMS

When an application is processed by the Microsoft Segmented-Executable Linker, the error message L2022 "export undefined" is generated.

Two possible causes of this error, and the corresponding steps to resolve the problem, follow.

CAUSE

CAUSE 1

The name of a function that is used in the application is not properly listed in the EXPORTS statement in the module definition (DEF) file.

CAUSE 2

Unprintable characters appear at the end of the EXPORTS statement in the module definition (DEF) file.

RESOLUTION

RESOLUTION 1

Determine the correct spelling of the label and correct the source file or the DEF file. For example, the names of functions called with the PASCAL calling convention are implicitly converted to uppercase letters. In functions exported with the CDECL calling convention, the case of the function name is preserved, and an underscore (_) is added to the function name as a prefix.

RESOLUTION 2

Modify the DEF file to remove the unwanted characters. Also make sure that the DEF file is saved from the text editor or word processor as plain text.

MORE INFORMATION

The linker /INFORMATION option provides additional information about the linking process to assist in tracking and correcting errors.