How To Fix CNV_PE_GEN126 - Knowledge base inconsistency: extension table is not specified

CNV_PE_GEN126 - Overview

• Message type: E = Error

• Message class: CNV_PE_GEN - Messages for object generation

• Message number: 126

• Message text: Knowledge base inconsistency: extension table is not specified

What causes this issue?

Knowledge base entries of parameter &V1& are inconsistent: Extension
table is not specified.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_PE_GEN126 - Details

• The SAP error message CNV_PE_GEN126, which indicates a "Knowledge base inconsistency: extension table is not specified," typically arises during data migration or conversion processes, particularly when using SAP's data migration tools or during system upgrades. This error suggests that there is a problem with the configuration of the knowledge base, specifically that an extension table has not been defined where it is expected.
  
  Cause:
  
  Missing Configuration: The extension table that is supposed to hold additional data related to the main table is not specified in the configuration.
  Incorrect Mapping: There may be an issue with how the data is mapped between the source and target systems, leading to missing references to extension tables.
  Inconsistent Data Model: The data model may not be consistent with the expected structure, possibly due to changes in the schema or missing updates during a migration process.
  Custom Development: If there are custom developments or modifications in the data model, they