How To Fix CNV_20200_CHECK099 - There are critical differences in the customer master data

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20200_CHECK - Messages for check functions (company code merge)

• Message number: 099

• Message text: There are critical differences in the customer master data

What causes this issue?

There are critical differences in the customer master data.

System Response

Warning, with action required

How to fix this error?

The customer master records should be harmonized before the merge.
Choose the <ZK>Details</> pushbutton in each message to see which master
records have differences. The field "not exists" in the listed table
means, that there is no entry found for the reference company code. In
this case, you should create an entry to ensure that the system uses the
settings from the reference company code.

Procedure for System Administrators

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20200_CHECK099 - There are critical differences in the customer master data ?

  The SAP error message CNV_20200_CHECK099 indicates that there are critical differences in the customer master data during a data migration or conversion process. This error typically arises in the context of SAP S/4HANA migrations or data transfers where customer master data is being validated against certain criteria.
  Cause:
  The error is usually caused by discrepancies in the customer master data that violate the expected structure or rules defined in the migration process. Common causes include:
  
  Inconsistent Data: Differences in customer data between the source and target systems, such as missing fields, incorrect formats, or invalid entries.
  Data Mapping Issues: Problems with how customer data is mapped from the legacy system to the new system.
  Missing Required Fields: Certain mandatory fields in the customer master data may not be populated.
  Duplicate Entries: The presence of duplicate customer records that need to be resolved before migration.
  Data Validation Rules: The data may not meet specific validation rules set in the target system.
  
  Solution:
  To resolve the CNV_20200_CHECK099 error, you can follow these steps:
  
  Review the Error Log: Check the detailed error log to identify the specific differences in the customer master data that triggered the error.
  Data Comparison: Compare the customer master data in the source and target systems to identify discrepancies.
  Correct Data Issues: 
  
  Update or correct any inconsistent or missing data in the source system.
  Ensure that all mandatory fields are filled and that the data adheres to the required formats.
  
  
  Data Mapping Review: Verify the data mapping configuration to ensure that all fields are correctly mapped from the source to the target system.
  Remove Duplicates: If duplicates are found, consolidate or remove them as necessary.
  Run Validation Checks: Use SAP tools or transaction codes to run validation checks on the customer master data before migration.
  Test Migration: After making the necessary corrections, perform a test migration to ensure that the error does not reoccur.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE16 (Data Browser) to view customer master data, and LTMC (Legacy Transfer Migration Cockpit) for data migration.
  SAP Notes: Check for any SAP Notes related to the CNV_20200_CHECK099 error for additional guidance or patches that may address known issues.
  Documentation: Review SAP documentation on data migration best practices, especially for customer master data, to ensure compliance with the required standards.
  
  By following these steps, you should be able to identify and resolve the issues causing the CNV_20200_CHECK099 error in your SAP system.