If RRS is not available or notifies APPC/MVS of an error condition, APPC/MVS is not able to participate in resource recovery. To minimize the effect of these errors on APPC/MVS work, APPC/MVS allows the LU to become active or continue processing, but does not allow it to accept Allocate requests for protected conversations. In some cases, RRS might notify APPC/MVS that the error has been resolved; then APPC/MVS allows the LU to begin accepting protected conversations again. In other cases, manual intervention, such as a cold start of the LU, might be required to restore protected conversations support.