Thanks Yani
That’s explaining everything - it’s a shame it’s not possible to record all these nice data when driving, but OK - it’s enough to make a failure diagnostic.
I have the same problem with my Alfa 156 JTS connecting with Bosh ABS 5.7 VDC : It logs data for maybe a minute or so and then it disconnect. I have sent the generated error report. I use a VAGCOM interface modified so it for this test only connects to pin 1 - makes no difference! The reported data ...