How To Fix IU891 - Table cluster & -> removed from ICNV

SAP Error Message - Details

• Message type: E = Error

• Message class: IU - Incremental Conversion (ICNV)

• Message number: 891

• Message text: Table cluster & -> removed from ICNV

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.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IU891 - Table cluster & -> removed from ICNV ?

  The SAP error message IU891, which states "Table cluster & -> removed from ICNV," typically indicates an issue related to the data consistency in the SAP system, particularly concerning the cluster tables and their entries in the database.
  Cause:
  
  
  Data Inconsistency: The error often arises when there is a mismatch or inconsistency in the cluster tables, which are used to store data in a compressed format. This can happen due to various reasons, such as:
  
  Manual deletion or modification of entries in the cluster tables.
  Issues during data migration or system upgrades.
  Corruption of data in the database.
  
  
  
  Configuration Issues: Sometimes, incorrect configuration settings in the system can lead to this error.
  
  
  Database Issues: Problems with the underlying database, such as corruption or misconfiguration, can also trigger this error.
  
  
  Solution:
  
  
  Check Data Consistency: Use transaction codes like SE11 (Data Dictionary) or SE14 (Database Utility) to check the consistency of the cluster tables. You may need to run consistency checks or repair tools provided by SAP.
  
  
  Rebuild Cluster Tables: If the cluster tables are corrupted, you may need to rebuild them. This can often be done using specific SAP programs or transactions designed for this purpose.
  
  
  Review Configuration: Ensure that the configuration settings related to the cluster tables are correct. This may involve checking the settings in the relevant customizing transactions.
  
  
  Database Maintenance: Perform database maintenance tasks, such as reorganization or optimization, to ensure that the database is functioning correctly.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. SAP frequently releases notes that provide solutions or workarounds for known issues.
  
  
  Consult SAP Support: If the issue persists, consider reaching out to SAP Support for assistance. They can provide more specific guidance based on your system's configuration and the nature of the error.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11, SE14, and SE38 (for executing reports).
  SAP Documentation: Review SAP documentation related to cluster tables and data consistency.
  Backup: Always ensure that you have a recent backup of your database before performing any repair or maintenance tasks.
  
  By following these steps, you should be able to diagnose and resolve the IU891 error in your SAP system.