#67 BMS CanBUS Error. V3.63

Newly built van, the builder is 1500 miles away and I need to start diagnosing. Getting a repeating 67 error on the Cerbo GX, I have two 200Ah Victron batteries. Terminators are present, no oddities are seen.

Downloading the Manual, will be setting up laptop to troubleshoot. Can I use a crossover network cable to connect the laptop and GX without needing a router or switch?

New to Victron family and CanBUS, feels like I’m back in school…

Any troubleshooting suggestions are appreciated. System is maybe 3 months old.

Which GX do you have?
I would update it to the current version first.

The GX has an internal wifi AP you can use, all documented in the manual.
Probably easier to use the HTML version and not PDF if you have internet challenges.