Multiple keys in KEY IS phrase not valid for file not having externally-described keys. Ignored.
20
Cause . . . . . : The KEY IS phrase within a START statement for a file may only contain multiple keys if the file has externally-described keys. The KEY IS phrase was ignored.
Recovery . . . : Either change the SELECT statement for the file to specify externally-described keys (RECORD KEY IS EXTERNALLY-DESCRIBED-KEY), or in the KEY IS phrase of the START statement specify just one key.