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Q66702: PRB: CV2206 Warning: Corrupt OMF Detected in <filename>

Article: Q66702
Product(s): Microsoft Programming Utilities
Version(s): 2.2,3.0,3.05,3.06,3.07,3.11,3.14,4.0,4.01,4.05,4.1
Operating System(s): 
Keyword(s): kberrmsg kb16bitonly kbCodeView kbDebug kbVC kbprb _IK
Last Modified: 26-JUN-2001

-------------------------------------------------------------------------------
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, 4.1 
- Microsoft CodeView for Windows, versions 3.0, 3.05, 3.06, 3.07, 4.0, 4.01, 4.1 
-------------------------------------------------------------------------------

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.

The following code example demonstrates this situation:

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

  _text ends
        end begin

Additional query words: 2.20 3.00 3.50 4.00 4.10

======================================================================
Keywords          : kberrmsg kb16bitonly kbCodeView kbDebug kbVC kbprb _IK 
Technology        : kbAudDeveloper kbCodeView kbZNotKeyword3 kbCodeView220DOS kbCodeView300DOS kbCodeView311DOS kbCodeView314DOS kbCodeView400DOS kbCodeView401DOS kbCodeView405DOS kbCodeView410DOS kbCodeView300 kbCodeView305 kbCodeView306 kbCodeView307 kbCodeView400 kbCodeView401 kbCodeView410
Version           : :2.2,3.0,3.05,3.06,3.07,3.11,3.14,4.0,4.01,4.05,4.1
Issue type        : kbprb

=============================================================================

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