Microsoft KB Archive/26796

= FIX: &quot;Operand Expected&quot; Error Message =

Article ID: 26796

Article Last Modified on 10/17/2003

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APPLIES TO


 * Microsoft Macro Assembler 5.0
 * Microsoft Macro Assembler 5.1 Standard Edition
 * Microsoft Macro Assembler 5.1a

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This article was previously published under Q26796



SYMPTOMS
The expression 'PUSH DWORD PTR OFFSET alabel' causes the Microsoft Macro Assember (MASM) versions 5.0, 5.1, and 5.1a to generate the error message:

error A2027: Operand expected



RESOLUTION
The line 'PUSH DWORD PTR (OFFSET alabel)' works correctly. Since OFFSET is a unary operator, it should not require parentheses.



STATUS
Microsoft has confirmed this to be a problem in MASM versions 5.0, 5.1, and 5.1a. This problem was corrected in MASM version 6.0.



MORE INFORMATION
It is important to note that the operating system that your program is running on must be capable of supporting 32 bit code segments to be able to run code in 32 bit segments. Most PC based operating systems such as MS-DOS 5.0, Windows 3.0, and OS/2 1.x do not provide support for 32 bit code segments. Newer operating systems and DOS extender packages may provide this support.

Sample Code
; Assemble options needed: none

.MODEL small .386

.STACK 1024

seg32 SEGMENT USE32 a32label DW 4321h seg32 ENDS

.CODE start: ;push DWORD PTR (OFFSET a32label) ;This is the MASM 5.0, ;5.1, and 5.1a workaround push DWORD PTR OFFSET a32label mov ax, 4C00h int 21h

END start

Additional query words: 5.00 5.10 5.10a buglist5.00 buglist5.10 buglist5.10a fixlist6.00

Keywords: kbfix KB26796

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