When modifying the UNZIPJCL the volume="*" specification is intended for use with SMS if you have a default SMS class defined. If you do not intend to use SMS or if you do not have a default SMS class defined you have two options:
1) To use a specific volser, change volume="*" to volume="packname".
Modify and issue the following CHANGE command:
C ALL 'volume="*"' 'volume="packname"'
2) Define a default SMS class
Note the comments in the UNZIPJCL:
//* volume="*" will use default work packs set by your site. (SMS)
//* if you require your files to be loaded to a specific pack
//* do a global edit change to 'volume="*' to 'volume="packname'
//* Please remember that you will have to delete these files
//* manually if you do not use the system default which normally
//* deletes these downloaded temporary files after a few days