Part of the process of creating a collaboration template is defining its messages. The collaboration runtime environment uses the contents of the message file as the text for logging, tracing, and exception messages.
Process Designer Express provides the Template Messages view to facilitate message creation. The message text specified is stored as part of the collaboration template. When you compile and deploy the template, Process Designer Express extracts the message content and creates or updates the message file for runtime use.
For detailed instructions on creating a message file, see Creating a message file.