How To Fix ITOB304 - Field &1 contains invalid characters &2

SAP Error Message - Details

• Message type: E = Error

• Message class: ITOB - Messages for development class ITOB

• Message number: 304

• Message text: Field &1 contains invalid characters &2

What causes this issue?

You have entered a character that is not allowed.

System Response

The system cannot create the equipment.

How to fix this error?

Only the characters A to Z as well as - and / are allowed in this
field. Change your entries accordingly.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ITOB304 - Field &1 contains invalid characters &2 ?

  The SAP error message ITOB304 indicates that a specific field (denoted by &1) contains invalid characters (denoted by &2). This error typically arises during data entry or data processing when the system encounters characters that are not allowed in the specified field.
  Cause:
  
  Invalid Characters: The field may contain characters that are not permitted, such as special characters, spaces, or non-alphanumeric characters.
  Data Format Issues: The data entered may not conform to the expected format (e.g., numeric fields containing letters).
  Configuration Settings: The field may have specific validation rules set up in the system that restrict certain characters.
  
  Solution:
  
  Check Field Requirements: Review the documentation or field requirements to understand what characters are allowed. Ensure that the data being entered complies with these requirements.
  Data Cleansing: Remove or replace any invalid characters in the field. This may involve:
  
  Removing special characters.
  Ensuring that only alphanumeric characters are used if required.
  Trimming any leading or trailing spaces.
  
  
  Validation Rules: If you have access to the configuration settings, check if there are any validation rules that can be adjusted to allow the necessary characters.
  Testing: After making changes, test the data entry again to ensure that the error does not reoccur.
  
  Related Information:
  
  Field Documentation: Refer to the SAP documentation for the specific module you are working with to understand the constraints on the field.
  Transaction Codes: If applicable, use transaction codes like SE11 (Data Dictionary) to check the field definitions and constraints.
  User Exits or BAdIs: If the error is occurring in a custom program, check for any user exits or BAdIs that might be enforcing additional validation rules.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide additional context.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.