I have been unable to use SGP with PHD2. In almost every instant, PHD has a download error from my SBIG ST-i after being stopped and started by SGP.
The problem process is:
- Slew to the target.
- Start PHD2 and calibrate (this is successful)
- Start a sequence.
- SGP stops PHD2 for the plate solve.
- Successful plate solve and SGP attempts to start guiding
- PHD2 fails to start
- I go to PHD2, which has a download error and disconnected the camera. At this point the camera will properly connect. I remove the USB cable and reconnect.
This happens each time.
I finally give up and use PHD, Nebulosity and Astrotortilla to get the image data. PHD works without errors. However, if I do not disconnect and reconnect the USB, PHD also has download errors. It seems as if the commands are causing the ST-i to go into a strange state.
I don't know if this is a PHD2 or SGP problem. I was using the latest version of PHD2 and even tried the beta version. I remember that SGP required a minimum of 2.4.1e and the SGP log shows that this is tested for. Should I revert to 2.4.1.e?