If you increase the number of HiRDB files, keep in mind the value in the pd_max_file_no operand. If the number of all HiRDB files in the RDAREAs exceeds the value in this operand, RDAREAs cannot be added.
You must handle the RDAREA's status as expanded below:
If the RDAREA is in error shutdown status, eliminate the cause of the error shutdown, and then use the pdrels command to release the error shutdown status.
If the RDAREA is in closed status, use the pdopen command to place it in open status.