Hi Stephane-
What version of FMax are you using? I'm using 3.7.0.95. When I tried updating FMax to 3.8.x, I had the same problem: FMax worked ok on it's own but failed with ACP. I tried 4 different versions of 3.8.x.
Steve Brady is aware of the problem, and I'm going to give 4.x a try and see if the problem has been resolved. If it's not working, I'll try to work with Steve to resolve it, using my system as a test site. But I'm putting this off until later in the lunar cycle (maybe 10 days) to take advantage of the recent improvement in weather.
If you're using 3.8.x, try dropping back to 3.7x and see if that works. That may get you up and running in the short term, but the best solution will be to figure this out and confirm that the new FMax 4.x is working with ACP.
Rob
Rob Capon
(Self-appointed) "Executive Director"
Stillhouse Mountain Observatory
Charlottesville, VA
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RCOS 12.5 with SBIG STL11000M
Televue NP101is with SBIG ST8300
Paramount ME with SkyX
Techn. Innovations PD10 with Digital Domeworks
Robofocuser
ACP with MaximDL and FocusMax