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Support Article

Users seeing NoClassDefFoundError



Application is experiencing sporadic error (see below), preventing user from completing workflow.

Error Messages

Error: Java.lang.NoClassDefFoundError: com/pega/pegarules/activity/... (customer specific activity name)

Steps to Reproduce

Not Applicable.

Root Cause

A defect in Pegasystems’ code or rules, specifically related to rule assembly caching.


Here is the local solution:

1. From SMA>Advanced>Class Management, click "Class Detail" button.
2.  Look in the list to find the class referenced in the error message and click the "Reload" button.



Published July 28, 2016 - Updated December 2, 2021

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