# Executing IMS Interface IVPs

After installing and activating IMS Interface, you should execute the IMS Interface IVPs to verify your installation. By performing the sample IVP installation steps and tests, you can verify the bidirectional communication from and to your IMS system through Substation ES.

## Procedure

1. Execute the Messaging Request or Reply IVPs.
   Before executing the Messaging Request or Reply IVPs, ensure that the following requirements are met:
   - The IMS Interface is installed.
   - The IVP IMS System Definitions are added or updated.
   - The IMS Region is recycled, if required.
   - Substation ES IVP listener is running and connected.
   - An MPP region is started and can run the IVP transaction.
   - Substation ES and the target IMS system are connected.

   The Messaging Request or Reply IVPs are submitted by using the JCL supplied by the installation.

   Data Set: `USERHLQ.JCL`

   Member:
   - `SXIRIRSL` (for Rendezvous)
   - `SXIRIJSL` (for EMS)

   For a description of the IVP sender and listener utilities, see the TIBCO Substation ES Configuration and Resources manual.

2. Execute the Trigger Message IVP.
   The Trigger Message IVP starts a BMP, which inserts a message into the IMS queue destined for Substation ES. Before executing the IVP, ensure that the following requirements are met:
   - The OTMA message routing is installed. For details, see Installing OTMA Message Routing.
   - All the requirements for Step 1 have been met.
   - The Trigger Message IVP is submitted by the JCL supplied by the installation. Tailor the following JCL member with the variables required for executing the IVP.

   Data Set: `USERHLQ.JCL`

   Member: `SXIIVPBT`

   For a description of IVP procedures, see the TIBCO Substation ES Configuration and Resources manual.

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