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Support Article

RuleNotFoundException error when attempting to display a harness



When clicking menu items on the harness screen which are defined with Navigation rules, they fail and an error screen is shown.

Error Messages

Caused by: Failed to find a 'RULE-OBJ-WHEN' with the name 'MYWHENRULE' that applies to '@baseclass'. There were 2 rules with this name in the rulebase, but none matched this request. The 2 rules named 'MYWHENRULE' defined in the rulebase are:
2 related to applies-to class '@baseclass', but were defined on subclasses: 'Myco-FW-EForm-Work'

Steps to Reproduce

Click on the harness screen menu items.

Root Cause

An application activity was renaming the pyDisplayHarness page to something else, after which the out-of-box Rule-Navigation.pxProcess activity attempted to use the nonexistent page.


Do not rename the pyDisplayHarness page in the application activity.

Published April 8, 2016 - Updated October 8, 2020

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