How To Fix 28076 - Key too long: &1. Maximum length &2.

SAP Error Message - Details

• Message type: E = Error

• Message class: 28 - Configuration

• Message number: 076

• Message text: Key too long: &1. Maximum length &2.

What causes this issue?

The syntax check found an expression that is too long: &V1&. The
maximum length expected at the cursor is &v2& characters.

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?

Some expressions are subject to restrictions on length.
Language-independent characteristic names and characteristic values,
for example, cannot be longer than 30 characters. Correct the
expression at the cursor.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 28076 - Key too long: &1. Maximum length &2. ?

  The SAP error message 28076, which states "Key too long: &1. Maximum length &2," typically occurs when you are trying to create or modify a database key that exceeds the maximum length allowed by the database table or index definition. This can happen in various scenarios, such as when defining primary keys, unique indexes, or foreign keys.
  Cause:
  
  Exceeding Maximum Length: The key you are trying to use (e.g., a combination of fields) exceeds the maximum length defined for that key in the database table or index.
  Data Type Mismatch: The data types of the fields being used in the key may not be compatible or may have different lengths than expected.
  Concatenation of Fields: If you are concatenating multiple fields to form a key, the total length of the concatenated string may exceed the allowed limit.
  
  Solution:
  
  Check Key Length: Review the definition of the database table or index to determine the maximum allowed length for keys. You can do this by checking the data dictionary (SE11) for the relevant table or index.
  Modify Key Definition: If possible, consider modifying the key definition to allow for a longer key. This may involve changing the data types or lengths of the fields involved.
  Reduce Key Length: If modifying the key definition is not feasible, consider reducing the number of fields in the key or using shorter fields to ensure that the total length does not exceed the maximum allowed.
  Review Data Model: Reassess the data model to ensure that the key design is optimal and does not lead to excessively long keys.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version you are using for any additional guidance or best practices.
  
  Related Information:
  
  Database Limitations: Different database systems (e.g., HANA, Oracle, SQL Server) may have different limitations on key lengths, so it's important to be aware of the specific database you are using.
  SAP Notes: Check SAP Notes for any known issues or updates related to this error message. SAP frequently releases notes that may provide additional context or solutions.
  Performance Considerations: Long keys can impact performance, so it's generally a good practice to keep keys as short as possible while still ensuring uniqueness.
  
  If you continue to experience issues after trying the above solutions, consider reaching out to your SAP Basis or development team for further assistance.