The CHECK command (see The CEDA CHECK command) checks the consistency of definitions within a group or within all of the groups within a list or lists. It does not, however, cross-check every attribute of a resource. You may still get error messages when installing a group, although there were no problems when you used the CHECK command.
If you use the CHECK GROUP command, CEDA cross-checks all of the resources in a specified group to ensure that the group is ready to be used. For example, CHECK might warn you that a transaction definition within the group does not name a program within the same group. (Note, however, that this might not be an error. The group might intentionally be paired with a group that does contain the program, or you may want the program to be autoinstalled, in which case it would not have a definition.)
If you use the CHECK LIST command, CEDA cross-checks every group named in the list. It does not simply check each group in turn, but merges the definitions in all of the listed groups, and checks them all. In this way it warns you if there are duplicate resource definitions, or references to definitions that do not exist.