How To Fix CNV_10020623 - Scan block &1: size unequal to sum of the included cluster block sizes

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_10020 - Message class for package 10020

• Message number: 623

• Message text: Scan block &1: size unequal to sum of the included cluster block sizes

What causes this issue?

A scan block includes several cluster blocks. The size of a scan block
therefore has to be the same than the sum of the included cluster block
sizes.
For cluster block &V1& this is not true. The scan block size is &V2&,
while the sum of the cluster block sizes is &V3&.

How to fix this error?

Rebuild the scan result by using transaction CNV_10020_SCAN.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_10020623 - Scan block &1: size unequal to sum of the included cluster block sizes ?

  The SAP error message CNV_10020623 typically occurs during data migration processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is a discrepancy between the expected size of a scan block and the actual size of the included cluster blocks. 
  Cause:
  
  Data Integrity Issues: The error often arises due to inconsistencies in the data being migrated. This could be due to corrupted data, missing records, or incorrect data formats.
  Configuration Issues: There may be misconfigurations in the migration settings or parameters that lead to incorrect calculations of block sizes.
  Cluster Table Issues: If the data being migrated involves cluster tables, there may be issues with how the data is structured or stored in those tables.
  Version Compatibility: The error might also occur if there are compatibility issues between the source and target systems, especially if they are running different versions of SAP.
  
  Solution:
  
  Data Validation: Check the source data for integrity. Ensure that there are no missing or corrupted records. Validate the data types and formats to ensure they match the expected formats in the target system.
  Review Migration Settings: Go through the migration settings and parameters to ensure they are correctly configured. Make sure that the mapping of fields and data types is accurate.
  Check Cluster Tables: If the data involves cluster tables, review the structure of these tables. Ensure that the data is correctly formatted and that there are no discrepancies in the sizes of the blocks.
  Use SAP Notes: Check for any relevant SAP Notes or updates that may address this specific error. SAP frequently releases patches and updates that can resolve known issues.
  Log Analysis: Analyze the logs generated during the migration process for more detailed error messages or warnings that can provide additional context for the issue.
  Consult SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They can provide more specific guidance based on the details of your migration scenario.
  
  Related Information:
  
  SAP Migration Cockpit: Familiarize yourself with the SAP Migration Cockpit and its functionalities, as it is often used for data migration tasks.
  Cluster Tables: Understand how cluster tables work in SAP, as this knowledge can help in troubleshooting issues related to data structure.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can share their solutions or experiences.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.