MSIR.0339 After SIRFIELD (subcmd), fieldname (field) is no longer produced by PAI because alias (alias) now is

This informational message indicates that a SIRFIELD 'subcmd' command was issued which caused a change in the behaviour of the PAI statement. Prior to this command, the name 'field' would be output by a PAI statement, but now it will not be. Instead, when occurrences of 'field' are present in a record, PAI will output the name 'alias'.

See the discussion of the PAI statement in the Sir2000 Field Migration Facility Reference Manual.