11.   ERROR--RETURN--DETAIL -- is a return parameter providing a report of errors encountered during the attempt to enter the contents of the root package.

12.   DEPTH -- is an input parameter indicating whether all of the package structure is to be searched for eligible modules or just the root package.

13.   A parameter can be specified to limit the list to the root package only.

14.   ROOT--PACKAGE--REQUIRED -- is an input parameter specifying the name of the root package which is to be listed and the issue number of this package.

15.   LIFESPAN--USER -- is an input parameter specifying the LIFESPAN user name and password, for whom the root package and its contents will be listed.

16.   DEPTH -- is an input parameter indicating whether all of the package structure is to be listed or just the root package.

17.   It then lists the contents of the root package and all sub-packages.

18.   The root package supplied does not exist.

19.   The version of the root package supplied does not exist.

20.   The root package supplied is not a package module.