How To Fix E2412 - Maximum number of secondary keys (&1) has been reached

SAP Error Message - Details

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 412

• Message text: Maximum number of secondary keys (&1) has been reached

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message E2412 - Maximum number of secondary keys (&1) has been reached ?

  The SAP error message E2412, which states "Maximum number of secondary keys (&1) has been reached," typically occurs when you are trying to create or modify a database table or a data structure in SAP that exceeds the allowed limit for secondary keys.
  Cause:
  In SAP, each database table can have a limited number of secondary keys (indexes) defined on it. The maximum number of secondary keys allowed is determined by the database and the specific SAP version you are using. When you attempt to add more secondary keys than the allowed limit, you will encounter this error message.
  Solution:
  To resolve the E2412 error, you can consider the following approaches:
  
  
  Review Existing Secondary Keys:
  
  Check the existing secondary keys on the table to see if any can be removed or modified. You can do this using the Data Dictionary (SE11) transaction.
  If there are unnecessary secondary keys, consider deleting them to free up space for new ones.
  
  
  
  Optimize Key Usage:
  
  Evaluate the necessity of each secondary key. Sometimes, you may find that certain keys are not being used frequently and can be removed.
  Consider whether you can combine multiple keys into a single key that serves multiple purposes.
  
  
  
  Database-Specific Limitations:
  
  Be aware that different database systems (e.g., Oracle, SQL Server, HANA) may have different limits on the number of secondary keys. Consult the documentation for your specific database to understand these limits.
  
  
  
  Table Redesign:
  
  If you find that you need more secondary keys than allowed, you may need to redesign the table structure. This could involve creating additional tables or using alternative methods to index the data.
  
  
  
  Consult SAP Notes:
  
  Check for any relevant SAP Notes that may provide additional guidance or solutions related to this error. SAP Notes can often provide insights into known issues and recommended practices.
  
  
  
  Contact SAP Support:
  
  If you are unable to resolve the issue through the above methods, consider reaching out to SAP Support for assistance. They may provide specific guidance based on your system configuration and requirements.
  
  
  
  Related Information:
  
  Transaction Codes: Use SE11 (Data Dictionary) to view and modify table definitions, and SE14 (Database Utility) to manage database objects.
  Documentation: Refer to SAP Help documentation for your specific version to understand the limitations and best practices for defining secondary keys.
  Performance Considerations: Keep in mind that having too many secondary keys can impact performance, so it's essential to strike a balance between the number of keys and the performance of database operations.
  
  By following these steps, you should be able to address the E2412 error and manage your secondary keys effectively in SAP.