To test this further I added:
(GX) Execute MPL program
Data: onlyonce testbull
So let me amend this. This works. (It was scrolling by; I neglected to put
a pause code in the screen).
We're down to the bulletins.
--- Mystic BBS v1.12 A46 2020/08/26 (Linux/64)
* Origin: Shipwrecks & Shibboleths [San Francisco, CA - USA] (21:1/227)