PRB: CV2206 Warning: Corrupt OMF Detected in <filename>

MS-DOS                        | OS/2                | WINDOWS

The information in this article applies to:

• Microsoft CodeView for MS-DOS, versions 2.2, 3.0, 3.11, 3.14, 4.0, 4.01, 4.05, and 4.1
• Microsoft CodeView for OS/2, versions 2.2, 3.0, 3.11, 3.12, and 3.5
• Microsoft CodeView for Windows, versions 3.0, 3.05, 3.06, 3.07, 4.0, 4.01, and 4.1
• Microsoft CodeView for Win32s, version 4.25

SYMPTOMS

An attempt to debug, in CodeView source mode, an application developed with the Microsoft Macro Assembler (MASM) fails. CodeView generate the following message:

   CV2206 Warning: Corrupt debug OMF detected in <filename>,
      discarding source line information

CAUSE

Code segments in the application do not have the class "CODE".

RESOLUTION

Modify the source code to specify the correct segment class and rebuild the application.

MORE INFORMATION

According to page 104 of the "Macro Assembler Programmer's Guide" for version 5.1:

   The CodeView debugger also expects code segments to have the class
   name 'CODE'. If you fail to assign a class type to a code segment,
   or if you give it a class type other than 'CODE', then labels may
   not be properly aligned for symbolic debugging.

Sample Code

; Assembler options needed: None

; To enable CodeView debugging, add 'CODE' to the following line _text segment para public

begin    proc
      mov ah, 4ch
      int 21h
begin    endp

      end begin