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Support Article

Error occurs when editing flows in Visio



When editing flows in Visio, error message displays in the UAT system.

Below is the environment used:
  • PRPC 6.1 SP2
  • WebSphere server
  • Windows 10
  • Visio 2010
  • Internet Explorer 11

Error Messages

Failed to reattach server session.

Steps to Reproduce

  1. Log in to PRPC 6.1.
  2. Open a Flow rule.
  3. Open the flow in Visio.

Root Cause

A defect or configuration issue in the operating environment.
The error occurs when HTTPOnly is appended to the cookies in the set-Cookie parameter present in the HTTP headers. Due to the HTTPOnly set in the headers, the requested parameters from the server (by the client) are not received. This caused the error on Visio.


Make the following change to the operating environment:
  1. Set  the HTTPOnly parameter to False in the server.

    For more information, refer to:

  2. Verify the TLS version and compare it with the working version. TLS 1.0 is supported and higher versions are not supported.
  3. Verify the settings for the Load Balancer and the Firewall between the working and non-working environments.

Published June 5, 2020 - Updated October 8, 2020

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