Procedures
- Issue the EXTRACT macro with the FIELDS=TIOT parameter to extract the TIOT from the TCB.
- Search the TIOT for the DD name associated with the shared data set.
- When you find the entry for the required DD name, obtain the UCB address from field TIOEFSRT.
- Issue the RESERVE macro specifying the address obtained in step 3 as the parameter of the UCB keyword.