Good Morning together,
first of all thank you for your comments.
@ Bardass: Already done, other device works fine
@ Clownfisch: Unfortunately this was not working
Any other ideas?
I changed the Cable, reinstall the Driver, Change from Mac to two different PC's, Restart the OSTC, Reset Log and all CF.
Does my reliable Diving Buddy gone to the happy hunting grounds

.
Any Comments from the HW-Team?
BR Thorsten