DFSMSdss issued the IOSCAPU macro to retrieve the pointer to the UCB whose device address is device_addr, and the IOSCAPU macro failed with the listed return_code and reason_code. This message indicates there is a problem with the support for UCBs above the 16MB line. The UCB whose address is device_addr reside above or below the 16MB line.
Processing continues. The return code is 4.
None.
None.
DFSMSdss