In message , Paul Scott
writes
gate staff was that it just one of those glitches that happen. I'd be
surprised if the fact it was a 'super off peak' was relevant to the problem
really, SWT have been issuing them for nearly 3 years now, and I've been
using them around London nearly as long.

Well I've had similar problems with *all* Super Off-peak 1-day
travelcards, which work at all TfL gatelines, but not at many other
"national rail" ones. The regular off-peak travelcards suffer
occasional failures at the odd gate, but work maybe 95% of the time, and
don't fail consistently anywhere.

I didn't realise that SWT had been using them for so long - the factor
perhaps you are missing here is that my tickets have been issued by FCC
- not one of the most competent train companies.

--
Clive Page