BUG: ML Uses DGROUP in Flat Model and Generates A2006

ID: Q120066

The information in this article applies to:

Microsoft Macro Assembler (MASM) for Windows NT, version 6.11

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 :
Version : :6.11
Platform :
Issue type :