How To Fix GK045 - The string contains invalid characters

SAP Error Message - Details

• Message type: E = Error

• Message class: GK - Messages for SAP Consolidation

• Message number: 045

• Message text: The string contains invalid characters

What causes this issue?

The specified ID contains invalid characters.
Valid characters are alphanumeric characters (0-9, A-Z, a-z) as well as
the following special characters (which are delimited by commas): _, -,
' ', /, #, &

System Response

Error

How to fix this error?

Only use valid characters for the ID.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message GK045 - The string contains invalid characters ?

  The SAP error message GK045, which states "The string contains invalid characters," typically occurs when a user inputs data that includes characters not allowed by the system in a specific field. This can happen in various contexts, such as when entering text in a form, uploading data, or processing transactions.
  Causes:
  
  Invalid Characters: The input string may contain special characters, symbols, or whitespace that are not permitted in the specific field.
  Field Restrictions: Certain fields in SAP have predefined formats or restrictions (e.g., numeric fields should only contain numbers).
  Data Type Mismatch: The data type of the input does not match the expected type for that field (e.g., entering letters in a numeric field).
  Encoding Issues: If data is being imported or uploaded, there may be encoding issues that introduce invalid characters.
  
  Solutions:
  
  Check Input Data: Review the string or data being entered to ensure it only contains valid characters. Remove any special characters or spaces that are not allowed.
  Refer to Field Documentation: Consult the SAP documentation or field help to understand the valid input formats and restrictions for the specific field.
  Data Validation: Implement data validation checks before submitting data to SAP to catch invalid characters early.
  Use Correct Encoding: If uploading data, ensure that the file is saved with the correct encoding (e.g., UTF-8) to avoid introducing invalid characters.
  Error Handling: If you are developing custom programs or reports, implement error handling to catch and manage invalid input gracefully.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Transaction Codes: Depending on where the error occurs, you may want to look into specific transaction codes (e.g., SE11 for data dictionary, SE37 for function modules) to analyze the data structure.
  User Exits and BAdIs: If you are customizing SAP, consider checking for user exits or BAdIs that might be affecting data validation.
  
  If the issue persists after checking the above points, it may be helpful to consult with your SAP support team or refer to SAP community forums for additional insights.