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Q120066: BUG: ML Uses DGROUP in Flat Model and Generates A2006

Article: Q120066
Product(s): Microsoft Macro Assembler
Version(s): 6.11
Operating System(s): 
Keyword(s): 
Last Modified: 04-MAY-2001

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The information in this article applies to:

- Microsoft Macro Assembler (MASM), version 6.11 
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SYMPTOMS
========

The assembler uses the DGROUP symbol to load the DS register with a data segment
value in the prolog code, even in a flat-model program. This causes the
assembler to generate "error A2006: Undefined symbol: DGROUP" because groups are
not supported in flat-model code.

This behavior is demonstrated through the following procedure definition and
generated prolog code, both from the listing file:

     MyProc   proc <loadds> word_val:WORD

     ;   push    bp
     ;   mov     bp, sp
     ;   push    ds
     ;   mov     ax, DGROUP
     ;   mov     ds, ax

         ret
     MyProc   endp

RESOLUTION
==========

To work around the problem, take out the <loadds> when building in flat
model.

STATUS
======

Microsoft has confirmed this to be a bug in MASM version 6.11. We are
researching this problem and will post new information here in the Microsoft
Knowledge Base as it becomes available.

Additional query words: 6.11 buglist6.11

======================================================================
Keywords          :  
Technology        : kbMASMsearch kbAudDeveloper kbMASM611
Version           : :6.11

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

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