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Support Article

Unable to open flow rule: This is a placeholder



An error message appeared under Design tab when a flow rule was opened from Designer Studio.

Error Messages

This is a placeholder.

Steps to Reproduce

  1. Log into Pega application.
  2. Open any flow rule.
  3. Navigate to Design tab.

Root Cause

Inclusion of Pega-EndUserUI ruleset in application caused the issue. It is not a PegaRULES application ruleset. The version or stack placement is not overridden.


Do not include Pega application rulesets in the application stack. Remove Pega-EndUserUI ruleset from the application.

  • This overrides the standard rule resolution order of discovery. For example, rules in PegaDesktop:07-10 take precedence over rules in Pega-UIEngine:07-10.
  • Using a patch version of the ruleset in user's application definition, implies that the application uses this version of the ruleset. It blocks the leveraging of any updates to the underlying application.

Published February 21, 2017 - Updated October 8, 2020

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