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Support Article

Visio error when trying to open flow editor



When opening a flow rule using flow editor, the following error message displays:

Error! Function:showVisioCommon, Type mismatch 333.

Error Messages

Error! Function:showVisioCommon, Type mismatch 333.

Steps to Reproduce

Open any flow rule and click flow editor.

Root Cause

A defect or configuration issue in the operating environment: The "HttpOnly" cookie attribute was set for the Pega-RULES browser cookie. This security attribute prevents the browser from being able to share the cookie with any other program running on the system. This prevented Visio integration Active X control from getting necessary session information and prevented Visio editing.


Make the following change to the operating environment:

​Disable the "HttpOnly" cookie attribute. 


Suggest Edit

Published January 31, 2016 - Updated October 8, 2020

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