Support Article
Reverse script fails with an error
SA-97769
Summary
The system is upgraded from Pega Platform 7.3.1 to Pega Platform 8.2.1 using the out-of-place Upgrade process. The Reverse script fails with an error.
Error Messages
Verify ML Reversal Readiness:
This Reversal requires distribution image of 08-02-03, but found 08-02-02
Steps to Reproduce
- Upgrade Pega Platform 7.3.1 to Pega Platform 8.2.1
- Configure setupDatabase.properties with PEGARULES and Reverse_timestamp.xml.
- Run reverse.sh from Pega Platform 8.2.1 installer.
Root Cause
This behavior is as per Pega product design.
For more information, refer to: https://community.pega.com/knowledgebase/documents/pega-platform-82-upgrade-guide-apache-tomcat-and-postgresql
Resolution
Here’s the explanation for the reported behavior:
The Reverse script must be used only to reverse patch release updates and not the full platform version updates. That is, the user can reverse Pega Platform 8.2.1 to Pega Platform 8.2; but cannot reverse Pega Platform 8.2.1 to Pega Platform 7.3.1 using this script.
In order to reverse the upgrade to what is required, backup the database from before the upgrade. Since the user is already on a split schema and would have the rules schema intact to revert, data schema must be backed up before starting the dataOnly upgrade (if the user required a method to revert the version back for any reason).
Published February 10, 2020 - Updated December 2, 2021
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