FIX: Warning A4057 When Using Local Variables

ID: Q68873


The information in this article applies to:
  • Microsoft Macro Assembler for MS-DOS, version 5.1
  • Microsoft Macro Assembler for OS/2, version 5.1


SYMPTOMS

If the code below assembled with Microsoft Macro Assembler (MASM) version 5.1, it produces the following error:

Warning A4057: illegal size for operand
This warning is falsely generated and does not occur with MASM version 5.1a.

The variable arg1, shown in the code below, is a local variable that is defined as a double word. The warning occurs when arg1 is used as a WORD PTR. This is acceptable and should not be flagged.


STATUS

Microsoft has confirmed this to be a problem in MASM version 5.1. This problem was corrected in version 5.1a.


MORE INFORMATION

Sample Code


; Assemble options needed: none

.MODEL small,c

.CODE

Begin PROC arg1:DWORD
    mov ax, WORD PTR arg1
    ret
Begin ENDP

END 

Additional query words: 5.10 buglist5.10 fixlist5.10a

Keywords :
Version : :5.1
Platform :
Issue type :


Last Reviewed: January 11, 2000
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