#15804 (Bug) [Errno 10054] An existing connection was forcibly closed by the remote host

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Component: DisplayCAL
Created by zwickpost

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I am having an issue with DisplayCAL creating a LUT for Davinci Resolve using a Spyder 5 Pro. I have followed all of the steps on the wiki and I run into the same issue every time after about an hour of running the calibration on my Samsung 4k TV. [Errno 10054] An existing connection was forcibly closed by the remote host. I have restarted it 3 different times and it always fails after about an hour. I have tried looking everywhere but I cannot find anyone else experiencing this same issue.

Log attached

Thank you.


DisplayCAL-logs 021819 (application/x-gzip | 2019-02-19 02:16:38)


4 thoughts on “[Errno 10054] An existing connection was forcibly closed by the remote host”

  1. The error message means the computer where Resolve is running (or Resolve itself) has closed the connection. Are you using a 3rd party firewall or security solution on the respective machine?

    1. Is there any other log or information I could provide to better help you give me a solution? I really need to figure this out to get my bay set up properly.

      Thank you so much for your help.

  2. If the machine is getting its IP address via DHCP, make sure the DHCP lease doesn’t expire after an hour (which could mean the machine gets a new IP address). If you’re running DisplayCAL and Resolve on the same machine, you can also use a localhost (or 127.0.0.1) connection instead, thus bypassing the network.

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