You can change how long some VTAM® I/O operations and internal procedures remain pending before VTAM notifies you. To do this, you use the IOINT start option, the MODIFY,VTAMOPTS command, or the MODIFY,IOPD command to change the I/O problem determination timeout interval. For example, if you use the command MODIFY,IOPD,IOINT=120, VTAM notifies you of I/O operations or internal procedures that remain pending for 120 seconds or more. After you are notified of a pending I/O operation, you can take any necessary action.

If you do not want to be notified of pending operations, you can specify IOINT=0. This deactivates the I/O problem determination function.

For information about the IOINT start option, see the z/OS Communications Server: SNA Resource Definition Reference. For information about the MODIFY VTAMOPTS and the MODIFY IOPD commands, see z/OS Communications Server: SNA Operation. See z/OS Communications Server: SNA Diagnosis Vol 1, Techniques and Procedures for more information about the IOPD trace facility.