FIX: /Z Switch Gives "Unknown Option" Error in MASM 6.0b

 Last reviewed: September 16, 1997
Article ID: Q93005
6.00b | 6.00b MS-DOS | OS/2 kbtool kbfixlist kbbuglist

The information in this article applies to:

  • Microsoft Macro Assembler for MS-DOS, version 6.0b
  • Microsoft Macro Assembler for OS/2, version 6.0b

SYMPTOMS

When the MASM compatibility driver provided with version 6.0b of the Microsoft Macro Assembler is called with the /Z command line switch, the following error occurs: 

   Unknown option: z. Use /help for list of options

RESOLUTION

Omit the /Z switch from the command line. The /Z switch has no effect.

STATUS

Microsoft has confirmed this to be a problem in MASM version 6.0b. This problem was corrected in MASM for MS-DOS version 6.1.

MORE INFORMATION

The ML driver invokes the Microsoft Macro Assembler (MASM) versions 6.x. MASM includes the MASM.EXE compatibility driver for backward compatibility with makefiles written for the MASM driver used in versions 5.x and earlier.

In MASM versions 5.x, the /Z switch displays on the screen the source file lines that contain errors. In MASM versions 6.0 and 6.0a, the /Z option is correctly ignored. However, in version 6.0b, MASM generates an error in response to this option switch and does not assemble the file.

Additional reference words: 6.00b buglist6.00b fixlist6.10
KBCategory: kbtool kbfixlist kbbuglist
KBSubcategory: MLIss
Solution Type : kbfix

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Last reviewed: September 16, 1997
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