How To Fix AXT_COMMON021 - Check table &1 is not compatible

SAP Error Message - Details

• Message type: E = Error

• Message class: AXT_COMMON - Extensibility common messages

• Message number: 021

• Message text: Check table &1 is not compatible

What causes this issue?

You have tried to use a check table for an extension that is not
compatible.
A compatible check table has to fullfil the following requirements:
It must not have more than one key field, except the client field
The data type of the key field must be based on a domain
A check table can have a related text table. The first character-type
field will be shown as a description in a value help.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Use another check table or change the table definition accordingly.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AXT_COMMON021 - Check table &1 is not compatible ?

  The SAP error message AXT_COMMON021, which states "Check table &1 is not compatible," typically occurs when there is an issue with the compatibility of a check table in the context of data validation or integrity checks. This error can arise in various scenarios, such as during data entry, configuration, or when executing certain transactions.
  Causes:
  
  Incompatible Data Types: The data types of the fields in the check table may not match the expected data types in the main table.
  Missing Entries: The check table may not have the necessary entries that correspond to the values being validated.
  Table Structure Changes: If the structure of the check table has been modified (e.g., fields added or removed), it may no longer be compatible with the referencing table.
  Transport Issues: If the check table was transported from another system, there may be inconsistencies or missing elements.
  Custom Development: Custom programs or enhancements may not be correctly handling the check table.
  
  Solutions:
  
  Check Data Types: Verify that the data types of the fields in the check table match those in the main table. Adjust them if necessary.
  Validate Entries: Ensure that the check table contains all the required entries. If entries are missing, add them to the check table.
  Review Table Structure: If there have been recent changes to the check table, review the changes to ensure compatibility with the main table.
  Transport Consistency: If the check table was transported, check for any inconsistencies or missing elements. You may need to re-transport or adjust the table.
  Debug Custom Code: If the error is occurring in a custom program, debug the code to ensure it is correctly referencing the check table and handling data appropriately.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary) to view and analyze the structure of the tables involved.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional guidance.
  System Logs: Review system logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the issue.
  Testing: After making changes, perform thorough testing to ensure that the issue is resolved and that there are no side effects.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.