Message type: E = Error
Message class:  CNV_PE - General messages for posting engine 
Message number: 290
Message text: Relevance identifier (RELV_ID) entry missing in knowledge base
You want to fill field &V1&-&V2&, however it is not yet defined in the
knowledge base for relevance identifier &V3& from which worklist
structure the structure &V1& shall be filled.
Error
Go to the knowledge base and maintain the missing relevance identifier
information.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_PE290 indicates that there is a missing entry for the relevance identifier (RELV_ID) in the knowledge base. This error typically arises during data migration or conversion processes, particularly when using SAP's Conversion Tools or Data Migration tools.
Cause: Missing Knowledge Base Entry: The specific relevance identifier (RELV_ID) that the system is trying to access does not exist in the knowledge base. This can happen if the knowledge base has not been properly initialized or if the relevant entries have been deleted or not created. Incorrect Configuration: The configuration settings for the data migration or conversion process may not be set up correctly, leading to the system looking for an entry that is not available. Version Mismatch: If you are using a version of the migration tool that is not compatible with the current system or data model, it may lead to missing entries.
Solution: Check Knowledge Base: Verify that the knowledge base
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