#LINK Status Codes

By default, the #LINK request is unconditional. Error conditions

that can occur are described below:

A no-space-in-program-pool condition, caused when the amount of storage in the program pool is inadequate to accommodate the program, will result in a delay until sufficient storage space becomes available (unless such a wait would cause a deadlock, in which case an abort would occur).
A nonconcurrent-program-in-use condition, caused when a copy of the program is already in use and is marked as nonconcurrent (indicating that this program can be used by a maximum of one task), will result in a delay until the program becomes available.
A storage-conflict condition, caused when a copy of the program previously loaded is temporarily overlayed while in use by a waiting task, will result in a delay until the program is replaced in the program pool.
Any abnormal condition will result in an abend. Conditions in this category include the following:
- I/O error
- Program not found in program definition table (PDT)
- A wait on storage (default action resulting from the no-storage-in-program-pool condition) would result in a deadlock

The issuing program can request return of control with the COND parameter to avoid a delay or an abend.

After completion of the #LINK function, the value in register 15 indicates the outcome of the operation:

Register 15 Value	Meaning
X'00'	The request has been serviced successfully.
X'04'	The request cannot be serviced because an I/O, program-not-found, or potential-deadlock error has occurred, or the program has not been defined in the program definition element (PDE).