How To Fix CNV20201116 - &: no master table, but there are external number ranges

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20201 -

• Message number: 116

• Message text: &: no master table, but there are external number ranges

What causes this issue?

In table CNV_20201_NR_OBJ, field TABNAME for the number range object is
empty.
There is no master table for the number range object, that is there is
no table which contains all numbers for the number range and from which
the current number level can be determined.
Besides, there are external number ranges for this object.

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

System Response

It is not possible to determine the current number range for the
external number ranges for this object.

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20201116 - &: no master table, but there are external number ranges ?

  The SAP error message CNV20201116 &: no master table, but there are external number ranges typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system is expecting a master table for a specific object, but it cannot find one, even though there are external number ranges defined.
  Cause:
  
  Missing Master Data Table: The system is looking for a master data table that should contain the relevant records, but it is not found in the database.
  External Number Ranges: The presence of external number ranges suggests that the system is configured to use external numbering for certain objects, but without a corresponding master table, the system cannot process these records.
  Configuration Issues: There may be configuration issues in the system that prevent the proper linking of number ranges to master data tables.
  Data Migration Issues: If you are migrating data from an older system, there may be inconsistencies or missing data that lead to this error.
  
  Solution:
  
  Check Master Data Configuration: Ensure that the master data tables for the relevant objects are correctly configured and exist in the system. You may need to create or activate these tables if they are missing.
  Review Number Range Configuration: Verify the configuration of external number ranges in the system. Ensure that they are correctly assigned to the relevant master data objects.
  Data Consistency Check: Perform a consistency check on the data being migrated. Ensure that all necessary records are present and that there are no discrepancies.
  Consult Migration Documentation: If you are using a specific migration tool or process, refer to the documentation for that tool to ensure that all steps have been followed correctly.
  SAP Notes and Support: Check for any relevant SAP Notes that may address this specific error. If necessary, contact SAP support for assistance.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE11 (Data Dictionary) to check the existence of master tables or SE78 (SAP Archive Link) to check number range configurations.
  Migration Cockpit: If you are using the SAP S/4HANA Migration Cockpit, ensure that you are following the correct migration path and that all prerequisites are met.
  SAP Community: Consider searching or posting in the SAP Community forums for additional insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.