Microsoft KB Archive/92868

= FIX: CodeView 4.0 and 4.01 Cannot Debug COM Files =

PSS ID Number: 92868

Article Last Modified on 6/26/2001

-

The information in this article applies to:


 * Microsoft CodeView for MS-DOS

-



This article was previously published under Q92868



SYMPTOMS
An attempt to debug a COM file with Microsoft CodeView fails.



CAUSE
Due to an incompatibility between CodeView versions 4.0 and 4.01 and Microsoft LINK versions 5.3 and 5.31.009, the symbol offsets stored in the DBG file differ by 0x100 from the offsets stored in the symbol table in the COM executable file.



RESOLUTION
Build the application using the small memory model during the development phase. Once the application has been debugged, switch to the tiny memory model for the final build.



STATUS
Microsoft has confirmed this to be a problem in CodeView versions 4.0 and 4.01 for MS-DOS. This problem was corrected in CodeView version 4.1 for MS-DOS.



MORE INFORMATION
COM files are built using the tiny memory model. A COM file combines its logical code and data segments into one physical segment. Because the debugging information that CodeView requires cannot fit in the physical segment, is it is placed into a separate DBG file.

Additional query words: 4.00

Keywords: kb16bitonly KB92868

Technology: kbAudDeveloper kbCodeView kbZNotKeyword3

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© 2004 Microsoft Corporation. All rights reserved.