If CICS Transaction Gateway stops and if ARM (z/OS Automatic Restart Manager) is configured for cross-system restarts, it attempts to restart CICS Transaction Gateway on a different z/OS image within in the same sysplex.
CICS Transaction Gateway fails to initialize following an Automatic Restart Manager (ARM) restart.
If z/OS fails, a whole group of related subsystems and applications also fail. ARM can restart all the failed systems automatically, in a predefined order, on a different z/OS image within the sysplex. This is called a cross-system restart.
In this situation, z/OS has failed and ARM has performed a cross-system restart of CICS Transaction Gateway on a different z/OS image in the same sysplex.
Modify the ARM profile for the ARM_ID to prevent cross-system restarts.
For more
information, see: z/OS V1R4.0 MVS Setting Up a Sysplex (SA22-7625-05).