Microsoft KB Archive/139076

= BUG: Mpw2lib Fails on Long File Names =

Article ID: 139076

Article Last Modified on 8/3/2001

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APPLIES TO


 * Microsoft Visual C++ 4.0 Cross Development Edition for Macintosh

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This article was previously published under Q139076



SYMPTOMS
When converting MPW-formatted object files for file names longer than the standard 8.3 MS-DOS format, Mwp2lib may generate an application error similar to one of these:

The instruction at xxxx referenced memory at xxxx. The memory could not be written.

-or-

The instruction at xxxx referenced memory at xxxx. The memory could not be read.



CAUSE
Mpw2lib cannot handle an object file that has a file name longer than the standard 8.3 MS-DOS format.



RESOLUTION
Truncate the object file name to eight characters.



STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.



MORE INFORMATION
Mpw2lib is a Windows utility used to convert MPW (Macintosh Programmer's Workbench) formatted object files to COFF (Common Object File Format) library files. The resulting file can be linked with code generated by Visual C++ for Macintosh. The file is transferred from the Macintosh to the Windows system using the Mfile utility. Windows NT allows you to preserve the long file names of the Macintosh in most cases.

You may not receive the error message for long file names. The problem appears to be inconsistent and can appear more frequently with longer file names. Occasionally, you may generate the following error instead of the previously listed error messages:

Fatal error M2L1003: Can't open file "xxx.o"

In general, however, it is safe to stay with long file names.

