How To Fix CNV_DMC_SIN258 - Unit of Measure: &1 already exists

CNV_DMC_SIN258 - Overview

• Message type: E = Error

• Message class: CNV_DMC_SIN - Messages for s-innovations migration

• Message number: 258

• Message text: Unit of Measure: &1 already exists

What causes this issue?

With object 'Material - extend existing record by new org levels' you
can only extend new unit of measures. You can't change already existing
entries.

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?

Delete these records from the template.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_DMC_SIN258 - Details

• The SAP error message CNV_DMC_SIN258 indicates that there is a conflict with the unit of measure (UoM) in the context of data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. The message states that the specified unit of measure (represented by &1) already exists in the system.
  
  Cause:
  
  Duplicate Entry: The most common cause of this error is that the unit of measure you are trying to create or import already exists in the system. This can happen if the data being migrated includes UoMs that are already defined in the target SAP system.
  Data Consistency Issues: There may be inconsistencies in the data being migrated, such as multiple records for the same UoM or incorrect mappings.
  
  Configuration Issues: The configuration settings in the migration tool may not be set up correctly, leading to attempts to create UoMs that are already present.
  
  
  Solution:
  
  Check Existing UoMs: Before running