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Code Fix: Unable to deploy a workflow after installing .NET Framework 4.7.1

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Issue Description

Unable to deploy a workflow from K2 Designer or K2 Package and Deployment after installing .NET Framework 4.7.1. The K2 Server stops and an error is displayed.

Error Message

The error message states: “An existing connection was forcibly closed by the remote host”.


  1. Ensure you have K2 Five installed.
  2. Get the K2 Five FP3 from Regional Support.
  3. Install the K2 Five FP3 to apply the fix.