Before starting, use Chameleon to open the VMD file you created in step 1 of this tutorial.

As previously stated, the goal is to ensure that field 10 of the MSH segment has a unique ID in it. This ID will then be sent back to Iguana by the receiving party in an ACK message. In this example, you will use the current time as a unique ID.

To create a unique ID:

• In the Workspace, in the Segments section, double-click MSH. The MSH segment window appears.

MSH Segment Definition

• Locate the tenth field, named Message Control ID, and click the Outbound Script ellipsis button.
• In the Editing Script window, type the following code:

import time
value = time.strftime("%Y%m%d%H%M%S")

This uses the current system time to generate a unique ID for your message.

	Another way to create a unique ID for field 10 of the MSH segment is to use the GUID (Globally Unique Identifier) Generator. See GUID Generator for more information.