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Error Messages

Errors recognized by the AARM Assembler are output to the listing file or displayed on the screen. Two classes of errors exist: Fatal Errors and Non-Fatal Errors.

  • Fatal Errors indicate an unrecoverable problem and cause the assembler to halt immediately. The error message is displayed on the screen. Fatal errors are usually caused by a disk problem or file-access problem.
  • Non-Fatal Errors do not halt the assembler but may indicate a problem that prevents correct or valid assembler output. Non-fatal errors are typically caused by syntax or semantic errors in the source file.


  • A program that assembles with no errors is not necessarily bug-free. No assembler can confirm correct or intended operation of your source code. That task is ultimately the sole responsibility of the software developer.
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