With wfgroupremovewf you cannot remove all the workflows from a group as this will result in an invalid workflow group configuration. In that case, the command aborts and an error message informs you about the abort cause.

As the workflow group should not be emptied, the command enables you to remove all the workflows from the workflow group only if the workflow group also contains a workflow group. This way, after removing all the workflows, the parent workflow group is not empty. See the figure below, The wfgroupremovewf Command.