How To Fix 28056 - Characteristic &1 not alphanumeric

SAP Error Message - Details

• Message type: E = Error

• Message class: 28 - Configuration

• Message number: 056

• Message text: Characteristic &1 not alphanumeric

What causes this issue?

The system syntax check discovered an error which is probably due to
the fact that the characteristic entered is not alphanumeric (CHAR
format), even though only alphanumeric characteristics can be entered
here.

System Response

The cursor marks the incorrect characteristic.

How to fix this error?

Check the expression at the cursor. Make any necessary corrections.
Please see also other possible causes of error (messages).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 28056 - Characteristic &1 not alphanumeric ?

  The SAP error message 28056, which states "Characteristic &1 not alphanumeric," typically occurs when a characteristic in a SAP system (often in the context of SAP Variant Configuration or similar modules) contains non-alphanumeric characters. This can happen during data entry, configuration, or when processing certain transactions.
  Cause:
  
  Non-Alphanumeric Characters: The characteristic name or value contains special characters, spaces, or symbols that are not considered alphanumeric (i.e., letters A-Z, a-z, and numbers 0-9).
  Incorrect Configuration: The characteristic may have been incorrectly defined in the system, allowing for invalid characters.
  Data Import Issues: If data is being imported from an external source, it may contain invalid characters that are not allowed in SAP.
  
  Solution:
  
  
  Check Characteristic Definition:
  
  Go to the transaction where the characteristic is defined (e.g., transaction CT04 for characteristics).
  Ensure that the characteristic name and its values only contain alphanumeric characters.
  
  
  
  Modify Characteristic Values:
  
  If you are entering or modifying characteristic values, ensure that they do not include any special characters or spaces.
  Use only letters and numbers.
  
  
  
  Data Validation:
  
  If you are importing data, validate the data beforehand to ensure it meets SAP's requirements for alphanumeric characters.
  Clean the data to remove any invalid characters before importing.
  
  
  
  Review Configuration Settings:
  
  Check the configuration settings for the characteristic to ensure that it is set up correctly and does not allow for non-alphanumeric entries.
  
  
  
  Testing:
  
  After making changes, test the characteristic in the relevant transactions to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to SAP Help documentation for more details on characteristics and their configuration.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CT04 (Create/Change Characteristic) and CU01 (Create Configuration Profile) for managing characteristics.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP Basis or functional team for further investigation.