Skip to main content

This content has been archived and is no longer being updated. Links may not function; however, this content may be relevant to outdated versions of the product.

Support Article

Error on using Connect REST rules post upgrade to Pega 7.4



Errors occur while using Connect REST rules post upgrade to Pega 7.4.

Error Messages


Caught unhandled exception: java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.util.HashMap 


Steps to Reproduce

  1. Upgrade from PRPC 6.2 to Pega 7.4
  2. Access the Connect REST rules

Root Cause

The pyinvokeconnectrest rule was copied to the custom ruleset. The same rule from previous version was invoked after the upgrade. 


Mark as Not available or Delete the pyInvokeconnectrest rule in the custom ruleset.


Published January 3, 2019 - Updated December 2, 2021

Was this useful?

0% found this useful

Have a question? Get answers now.

Visit the Collaboration Center to ask questions, engage in discussions, share ideas, and help others.

Did you find this content helpful?

Want to help us improve this content?

We'd prefer it if you saw us at our best.

Pega Community has detected you are using a browser which may prevent you from experiencing the site as intended. To improve your experience, please update your browser.

Close Deprecation Notice
Contact us