Hi, please assist - I'm wondering whether this was an anomaly or the start of something.

Just after starting the car (2001 Z3 Coupe auto) and driving off, the card jerked and the transmission warning light came on. I stopped and turned off the car, pulled the handbrake on, mulled over it a bit while finding out it was the transmission warning light (never had to know that before). When I restarted, I didn't get the warning again and I drove hone a few miles without issue.

Diagnostics however show the following:
EGS - 32 EGS gear monitoring 1 Transmission monitoring B2460-99999

I also got the attached when I selected the Read Test Code function.2018-09-16 12.57.40-1.jpg

My web search found only one reference to this, on a post on this site, but only to the B2460-99999 part, and it had two other another transmission faults, so no help there.

Anyone have the same issue?