How To Fix CNV855 - Reloading is not possible for table &. Not all entries are in the cluster

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV - Conversion: Messages for Conversion Services (CNCC)

• Message number: 855

• Message text: Reloading is not possible for table &. Not all entries are in the cluster

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV855 - Reloading is not possible for table &. Not all entries are in the cluster ?

  The SAP error message "CNV855 Reloading is not possible for table &. Not all entries are in the cluster" typically occurs during data migration or conversion processes, particularly when using the SAP Landscape Transformation (SLT) or SAP Data Services tools. This error indicates that there is an issue with the data consistency in the cluster tables, which are used to store data in a compressed format.
  Cause:
  
  Incomplete Data: The error suggests that not all entries required for the operation are present in the cluster. This can happen if some entries were deleted or not properly migrated.
  Data Corruption: There may be corruption in the cluster tables, leading to inconsistencies.
  Incorrect Configuration: The configuration settings for the data migration process may not be set up correctly, leading to issues in reading or writing data.
  Locking Issues: If the table is locked by another process, it may prevent the necessary entries from being accessed.
  
  Solution:
  
  Check Data Consistency: Verify the integrity of the data in the cluster tables. You can use transaction codes like SE11 or SE16 to inspect the data.
  Rebuild Cluster Tables: If data corruption is suspected, you may need to rebuild the cluster tables. This can involve using specific SAP tools or transactions designed for data repair.
  Review Migration Settings: Ensure that the settings for the data migration process are correctly configured. This includes checking the source and target systems, as well as any transformation rules.
  Check for Locks: Use transaction SM12 to check for any locks on the table that might be preventing access. If locks are found, they may need to be released.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error. SAP frequently updates its knowledge base with solutions for known issues.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for assistance. They can provide more detailed guidance based on your specific system configuration and the context of the error.
  
  Related Information:
  
  Cluster Tables: These are special types of tables in SAP that store data in a compressed format. They are often used for performance optimization.
  Data Migration Tools: Familiarize yourself with the tools you are using for data migration, such as SAP Data Services or SLT, as they may have specific logs or error messages that can provide more context.
  Transaction Codes: Common transaction codes that may be useful include:
  
  SE11: Data Dictionary
  SE16: Data Browser
  SM12: Display and Delete Locks
  SLG1: Application Log
  
  
  
  By following these steps, you should be able to diagnose and resolve the issue related to the CNV855 error message in SAP.