If the HiRDB server is executing any of the processes listed below, the HiRDB client waits until that process terminates.

• Changing the system definitions (executing the pdchgconf command)
• Updating the current HiRDB to the HiRDB update version (executing the pdprgcopy and pdprgrenew commands)
• Performing planned system switchover by using the transaction queuing facility (pdtrnqing command)

While the HiRDB client is waiting, the wait time is monitored based on the PDCWAITTIME time. If the PDCWAITTIME time is exceeded, the wait status is released and a PDCWAITTIME over error is returned to the UAP.

Depending on the execution timing, the HiRDB client might not be able to detect that the above process is underway, resulting in a communication error. If you know ahead of time that the above process is to be performed, evaluate the use of the automatic reconnect facility. If you use this facility, the HiRDB client can continue processing without returning an error to the UAP even if the above process is underway.