How to know that Mail360 Manager is needed for MailStream Plus to generate the Mail Piece File

Product affected: MailStream Plus™, all versions, all platforms
Parameter IMBCTL position 28 has options for producing a 'Mail Piece File'.  This file is a custom format used for inputting mail piece information into the EngageOne™ Delivery Audit tracking application.

Using X or M to generate the Mail Piece File requires having Mail360 Manager installed, which is separately available.   MailStream Plus (MSP) calls Mail360 Manager which generates the file.  If Mail360 Manager is not installed, MSP will abend with an error.  
For example on Windows it will be-
08/18/2017  16:48:08            MSNA00A    W M3STUB00 MAIL360 program not installed.
08/18/2017  16:48:08            MSNA00A    E Please install MAIL360 System.
UPDATED:  August 19, 2019