Microsoft KB Archive/68873

= FIX: Warning A4057 When Using Local Variables =

Article ID: 68873

Article Last Modified on 10/20/2003

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APPLIES TO


 * Microsoft Macro Assembler 5.1 Standard Edition

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This article was previously published under Q68873



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.



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: kbfix KB68873

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