Space switch PC routines have special recovery considerations. A space switch PC routine has active binds to address spaces other than home. If the PC routine tries to access data in one of these address spaces after the address space has terminated, the PC routine will incur a program check and its recovery routine might get control. The SETFRR macro provides options that specify the cross memory mode in which the recovery routine must get control. The ETDEF macro with the ARR parameter and the ESTAEX macro also can define recovery routines for PC routines in cross memory mode. However, these recovery routines are not protected against memory terminations of associated address spaces.

There are also options that enable a recovery routine to get control as a resource manager when the requested cross memory mode cannot be established in order to recover resources serialized by local (CML) or global locks. For information on recovery in cross memory mode, see z/OS MVS Programming: Authorized Assembler Services Guide.