DFSMShsm issues message ARC0026E specifying EOV ERROR ON JOURNAL when the Journal data set becomes full. If this error is received, begin CDS backup processing by using the BACKVOL CDS command or the SETSYS command with the AUTOBACKUPSTART parameter. It is preferable that the backup of the control data sets be initiated on the system that encountered the error. This creates backup copies of the MCDS, BCDS, OCDS and nulls the journal data set so that all the space in it becomes available. If you are in a multiple DFSMShsm-host environment, issue the RELEASE ALL command on each system that received the ARC0026E message after the completion of the backup of the data set.