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This content has been archived and is no longer being updated. Links may not function; however, this content may be relevant to outdated versions of the product.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

AES does not start due to "clr enabled" exceptions



An exception prevents normal startup and operation of the AES server.

Error Messages

Caused by: Execution of user code in the .NET Framework is disabled. Enable "clr enabled" configuration option.
21:11:09,936 INFO [stdout] (Dispatcher-Thread-102) at
21:11:09,936 INFO [stdout] (Dispatcher-Thread-102) at
21:11:09,936 INFO [stdout] (Dispatcher-Thread-102) at
21:11:09,936 INFO [stdout] (Dispatcher-Thread-102) at$PrepStmtExecCmd.doExecute(

Steps to Reproduce

Not Applicable

Root Cause

A defect in Pegasystems’ code or rules: The database column mapping was incorrectly using mixed case, which caused the database to attempt to use the CLR functionality to read from the BLOB.


Apply HFix-24976.


Suggest Edit

Published January 31, 2016 - Updated December 2, 2021

Did you find this content helpful? Yes No

Have a question? Get answers now.

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

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