KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q30377: FIX: Error Message A2051 Incorrectly Generated

Article: Q30377
Product(s): Microsoft Macro Assembler
Version(s): 5.1,5.1a
Operating System(s): 
Keyword(s): 
Last Modified: 06-MAY-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Macro Assembler (MASM), versions 5.1, 5.1a 
-------------------------------------------------------------------------------

SYMPTOMS
========

The code given below generates the following error message:

  A2051: Operand not in current CS ASSUME segment

The error is caused by the JE NEAR PTR statement. However, the first jump
statement assembles without error. Both statements should or should not assemble
as they generate full 16-bit fixup records.

RESOLUTION
==========

You can work around this problem by not using the PTR operator in the JE
instruction.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft Macro Assembler (MASM)
version 5.1 and 5.1a. This problem was corrected in MASM version 6.0.

MORE INFORMATION
================

The following code demonstrates the problem:

Sample Code
-----------

     .386
     PGROUP  group   CODE,NCODE
     CODE    segment use16 byte public 'prog'
             assume  cs:PGROUP
             jmp     SYM
             je      near ptr SYM
     CODE    ends
     NCODE   segment use16 byte public 'prog'
             assume  cs:PGROUP
     SYM:
     NCODE   ends
             end

Additional query words: 5.10 5.10a buglist5.10 buglist5.10a fixlist6.00

======================================================================
Keywords          :  
Technology        : kbMASMsearch kbAudDeveloper kbMASM510 kbMASM510a
Version           : :5.1,5.1a
Solution Type     : kbfix

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

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.