How does one go about creating multiple lines (with the HTML BR tag) in a success message? Using BR in the Process Success Message attribute works e.g. Line1 BR Line2 but when creating a dynamic success message by assigning the value (with embedded BR tags) to a page item and using &P1_X. notation in the success message attribute, the BR tag is escaped and shows up on the message shown on the screen
Figured it out. Create a Display Only page item with Save Session State=No and Escape Special Characters=No with a display condition of Never
In the process code, assign the success message including the BR tags to this display-only page item. Use &P1_DISPLAY. in the process Success Message.
Hope that helps someone.