How To Fix C+166 - Attributes for index &1 in table &2 could not be set

SAP Error Message - Details

• Message type: E = Error

• Message class: C+ -

• Message number: 166

• Message text: Attributes for index &1 in table &2 could not be set

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 C+166 - Attributes for index &1 in table &2 could not be set ?

  The SAP error message C+166 indicates that there is an issue with setting attributes for an index in a specific database table. This error typically arises during the creation or modification of database indexes in the Data Dictionary (DDIC) of SAP.
  Cause:
  The error can be caused by several factors, including:
  
  Invalid Index Definition: The index definition may contain invalid or incompatible attributes.
  Database Constraints: There may be existing constraints or dependencies in the database that prevent the index from being modified or created.
  Data Dictionary Inconsistencies: There could be inconsistencies in the Data Dictionary that need to be resolved.
  Authorization Issues: The user may not have the necessary authorizations to modify the index or table.
  Technical Settings: The technical settings of the table or index may not be correctly configured.
  
  Solution:
  To resolve the C+166 error, you can follow these steps:
  
  
  Check Index Definition:
  
  Review the index definition in the Data Dictionary (transaction SE11) to ensure that all attributes are valid and correctly defined.
  
  
  
  Review Database Constraints:
  
  Check for any existing constraints on the table that might conflict with the index creation or modification. This can include primary keys, foreign keys, or unique constraints.
  
  
  
  Consistency Check:
  
  Perform a consistency check on the Data Dictionary using transaction SE14 (Database Utility) to identify and resolve any inconsistencies.
  
  
  
  Authorization Check:
  
  Ensure that the user has the necessary authorizations to create or modify indexes. This may involve checking roles and permissions in transaction PFCG.
  
  
  
  Technical Settings:
  
  Verify the technical settings of the table and index. Ensure that they are configured correctly according to the requirements of your application.
  
  
  
  Recreate the Index:
  
  If the index is corrupted or improperly defined, consider dropping and recreating the index with the correct attributes.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE14 (Database Utility), SE80 (Object Navigator).
  SAP Notes: Search for specific SAP Notes related to error C+166 for any known issues or patches.
  Documentation: Review SAP documentation on database indexes and Data Dictionary management for best practices and guidelines.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.