You are running the DFSMSrmm EDGUTIL MEND function for volume information. DFSMSrmm did not find any stacked volume record for existing volumes defined as contained on the stacked volume. DFSMSrmm adds the stacked volume to the control data set using information from the contained volumes.

In the message text:

volser

Is the volume serial number of the stacked volume.

correct_count

The count of the volumes with this stacked volume named as their container.