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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

ML Error Messages 

The error messages generated by MASM components fall into three categories:

  • Fatal errors. These indicate a severe problem that prevents the utility from completing its normal process.

  • Nonfatal errors. The utility may complete its process. If it does, its result is not likely to be the one you want.

  • Warnings. These messages indicate conditions that may prevent you from getting the results you want.

All error messages take the following form:

        Utility: Filename (Line) : [Error_type} (Code): Message_text



The program that sent the error message.


The file that contains the error-generating condition.


The approximate line where the error condition exists.


Fatal Error, Error, or Warning.


The unique 5- or 6-digit error code.


A short and general description of the error condition.

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