TZUTC: -0700
MSGID: 58469.sync_sys@1:103/705 2d005cb9
PID: Synchronet 3.21a-Linux master/27cbebcb9 Aug 10 2025 GCC 12.2.0
TID: SBBSecho 3.29-Linux master/27cbebcb9 Aug 10 2025 GCC 12.2.0
BBSID: VERT
CHRS: ASCII 1
FORMAT: flowed
https://gitlab.synchro.net/main/sbbs/-/issues/964#note_7516

That doesn't look like an argument that evaulate to null or undefined. If you
remove the lines you added, do you still get the same error?

Sharing your entire modified script (or a diff against the original) might be
helpful.
--- SBBSecho 3.29-Linux
 * Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)
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SEEN-BY: 5075/35
PATH: 103/705 280/464 633/280 229/426