The WRITE JOURNALNUM command is supported in CICS® Transaction Server for z/OS®, Version 3 Release 1 for compatability with earlier releases: the WRITE JOURNALNAME command is preferred for new applications. If resource security applies to a transaction executing WRITE JOURNALNUM, the journal number is prefixed with 'DFHJ' before the security check is applied. Thus, writing to journal number 2 requires UPDATE access to the resource DFHJ02.