Symptoms:
GIM58903W SMP/E COULD NOT PROCESS A ++HOLD FIXCAT MCS BECAUSE IT WOULD HAVE MADE A CHANGE TO THE GLOBAL ZONE THAT CANNOT BE PROCESSED COMPLETELY BY PRIOR LEVELS OF SMP/E when receiving maintenance for CA Roscoe.
Resolution:
You must migrate to SMP/E 3.5 (and use the UPGRADE command to enable FIXCAT processing) in order to actually store any of the new FIXCAT data into your Global zones.
Workaround:
Earlier than that IBM has some toleration fixes, but they do not really do anything.