Error "Failed to connect to input connection “”., after Selecting Run for a Flow

Published: 19 Nov 2020
Last Modified Date: 08 Jul 2022


When running a flow that uses published data sources or simply attempting to run a published flow, the following error is returned: Failed to connect to input connection “”.


  • Tableau Server 2020.2
  • Tableau Prep Conductor
  • Windows 10
  • Tableau Data Engine


Option 1

Check that the appropriate database drivers are installed on each Tableau Server node where needed.

Option 2

See local networking settings needed with respect to either proxies or load balancers that are present.

If applicable for the environment, use TSM to enter:
tsm configuration set -k -v "<URL used to access Tableau Server in a browser and without https>"
tsm configuration set -k gateway.public.port -v 443
tsm configuration set -k gateway.trusted -v "<server_ip_address>"
tsm configuration set -k gateway.trusted_hosts -v "<name1, name2, name3>"
tsm pending-changes apply


This may be related to a network misconfiguration in an environment where proxy server and/or load balancer is used.

Additional Information

Did this article resolve the issue?