NOT ELIGIBLE FOR AUTOS has multiple meanings. It indicates that a dataset was created in a given step and passed around a set of successor steps. Any step where the dataset was passed, is marked as NOT ELIGIBLE FOR AUTOS, meaning CA-11 is not going to select those steps for restart. Also, any passed dataset that is read in as input to a successor step, will also be marked as NOT ELIGIBLE FOR AUTOS. CA-11 is not going to recommend those steps as automatic restartable steps.
Additionally, a U11-031 indicates there are steps within the jcl that has a UCC7NR DD DUMMY. This type of dummy card prevents the user from restarting in these types of steps.