How To Fix /UI2/CACHE021 - [ &1 ] Performing validation of rule &2

SAP Error Message - Details

• Message type: E = Error

• Message class: /UI2/CACHE -

• Message number: 021

• Message text: [ &1 ] Performing validation of rule &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /UI2/CACHE021 - [ &1 ] Performing validation of rule &2 ?

  The SAP error message /UI2/CACHE021 typically relates to issues with the validation of a rule in the SAP Fiori/UI5 framework, particularly concerning the caching mechanism used for UI elements. This error can occur when there is a problem with the configuration or the data being processed.
  Cause:
  
  Invalid Configuration: The rule being validated may have incorrect or incomplete configuration settings.
  Data Issues: The data being processed may not meet the expected format or criteria defined in the rule.
  Cache Corruption: There may be issues with the cache that prevent the system from validating the rule correctly.
  Version Mismatch: There could be a mismatch between the versions of the UI components or libraries being used.
  
  Solution:
  
  Check Configuration: Review the configuration of the rule that is being validated. Ensure that all required fields and settings are correctly defined.
  Validate Data: Ensure that the data being processed adheres to the expected format and criteria. Check for any inconsistencies or errors in the data.
  Clear Cache: Clear the cache for the UI components. This can often resolve issues related to stale or corrupted cache data. You can do this by:
  
  Using transaction code /UI2/FLP to access the Fiori Launchpad and clear the cache.
  Alternatively, you can use the transaction /IWFND/CACHE to clear the OData cache.
  
  
  Check for Updates: Ensure that you are using the latest version of the SAP Fiori/UI5 libraries. If there are updates available, apply them to see if the issue is resolved.
  Review Logs: Check the application logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the issue.
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error message or provide additional troubleshooting steps.
  Documentation: Review the official SAP documentation for Fiori/UI5 to understand the configuration and validation processes better.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues and can share their solutions.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.