Re: Connection to 1100 dropped

Ray Gralak

Hi Bryan,

The log file doesn't provide any information why the "connection" started to time out. I put "connection" in quotes because when APCC doesn't establish a single long lasting TCP connection, but a new TCP connection every request to the mount.

So, this could have been a hardware error or a resource issue in your computer's TCP stack. You might try connecting via UDP instead as it does not need to create a new connection every command request.

Best regards,

-Ray Gralak
Author of APCC (Astro-Physics Command Center):
Author of PEMPro:
Author of Astro-Physics V2 ASCOM Driver:
Author of PulseGuide:
Author of Sigma:

-----Original Message-----
From: ap-gto@... [mailto:ap-gto@...]
Sent: Saturday, November 18, 2017 9:46 PM
To: ap-gto@...
Subject: [ap-gto] Connection to 1100 dropped

After running for almost three hours without incident, the connection from APCC to the 1100 dropped. Was
able to reconnect manually in APCC, Park, and re-start. Still lost some images.

The logfile is in Dropbox at

The drop is shortly after step 0359029 at time 21:51:06.242

This has happened before, intermittently. That suggests an erratic connection (cable, port ?) somewhere.

I use TCP LAN to connect APCC to my PC.

Any insight is appreciated.


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