How To Fix AXT_GEN242 - Only non-unique indices allowed for standard tables

SAP Error Message - Details

• Message type: E = Error

• Message class: AXT_GEN - Generation framework

• Message number: 242

• Message text: Only non-unique indices allowed for standard tables

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message AXT_GEN242 - Only non-unique indices allowed for standard tables ?

  The SAP error message AXT_GEN242, which states "Only non-unique indices allowed for standard tables," typically occurs when you are trying to create a unique index on a standard table in the SAP system. Standard tables in SAP are designed to have non-unique indices to ensure that they can accommodate multiple entries for the same key fields.
  Cause:
  The primary cause of this error is an attempt to define a unique index on a standard table. In SAP, standard tables are predefined by the system, and their structure, including indices, is managed by SAP. Unique indices are not allowed on standard tables because they can lead to data integrity issues and conflicts with the way standard tables are intended to be used.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Index Definition: Review the index definition you are trying to create. Ensure that you are not attempting to create a unique index on a standard table.
  
  
  Use Non-Unique Indices: If you need to create an index for performance reasons, ensure that it is defined as a non-unique index. This can be done by specifying the index type correctly in your index creation logic.
  
  
  Use Custom Tables: If you require a unique index for your specific use case, consider creating a custom table (Z-table) instead of using a standard table. Custom tables allow you to define unique indices as needed.
  
  
  Review SAP Documentation: Consult the SAP documentation or help resources for more information on the specific table you are working with and its allowed index types.
  
  
  Consult with SAP Support: If you are unsure about the implications of changing indices or if you encounter further issues, consider reaching out to SAP support or your SAP Basis team for assistance.
  
  
  Related Information:
  
  Standard vs. Custom Tables: Understand the differences between standard and custom tables in SAP. Standard tables are provided by SAP and have predefined structures, while custom tables are created by users and can be tailored to specific needs.
  Index Types in SAP: Familiarize yourself with the different types of indices in SAP, including unique and non-unique indices, and their appropriate use cases.
  Data Integrity: Be aware of the importance of data integrity in SAP systems and how unique indices can affect it.
  
  By following these steps and understanding the underlying principles, you should be able to resolve the AXT_GEN242 error effectively.