If you use the AUTOTAG YES option, the utility adds a 4-byte field at the beginning of each output record for each SELECT statement. The DB2UNLD data map that you create based on the unload file does not include this 4-byte field, which causes subsequent fields to be mapped incorrectly. If you then import the data map into PowerCenter for a PWX Batch session and try to run the session, the session fails. To avoid this problem either do not use the AUTOTAG YES option or manually add a 4-byte field at the beginning of each data map.

If you use the FIXEDVARCHAR NO option, the PowerExchange Navigator issues mapping errors when it tries to access the unload file to generate a data map. To avoid this problem, generate the unload file with the FIXEDVARCHAR YES option.