Diagnostic Message Types

IAS sends these types of diagnostic messages:

fatal error messages

IAS detected incorrect input that causes termination. IAS does not produce an object file. Fatal error message numbers have this format: A1xxx.

error messages

IAS detected incorrect input. Execution continues. However, IAS does not produce an object file. Error message numbers have this format: A2xxx.

warning messages

IAS detected legal, but suspicious input. Execution continues and IAS produces an object file. Warning message numbers have this format: A3xxx.