Provide a valid group ID. Client asks how does he determine his group id. There are several ways:
1) Check your OMVS segment of your security record.
2) Issue the OMVS command 'id' :
uid=973(USERID1) gid=8(SYSPROGS) groups=1(OMVSGRP),84(INSTSGRP)
3) Use the OMVS command ls -E in a directory for which you own:
$ ls -E
-rw-rw---- --s- 1 USERID1 OMVSGRP 555765 Feb 4 2016 myfile.dat
The 5th column is the group ID.
Once a valid group ID is provided the install proceeds as designed.