On sept 17, during an imagaing run, the first Autofocus was successful.
The next scheduled Autofocus failed. So did all later Autofocuses.
On sept 17 I was using FocusMax 3.84.
Meanwhile installed FM V4, but Autofocus still fails with the same error message.
If my interpretation is correct the mount may be at fault although imaging, slews and guiding are Ok.
If the mount is causing the problem, would it be possible to nail down the problem a bit further to facilitate the repair?
The file LastAFTime shows sept 17, 19:38:39 and seems to confirm my observation.
Appreciate your help.