I bought an NXEA version today to go to Heathrow to meet my aged mother
returning from afar.

It worked fine on NR and on LU at Tottenham Hale and Heathrow T5. But at
Putney (SWT) it was rejected with code 122. I queried this with staff who
said "it's Super Off Peak", at which point I recalled a similar problem in
the past at Putney. As a result of the hassle I missed a train and was
over half an hour later home to Cambridge.

Before I complain to SWT for crap programming of their ticket gates whose
fault is this actually likely to be - theirs or NXEA's?

--
Colin Rosenstiel