How To Fix W0158 - Entry & is not permitted for the field name

SAP Error Message - Details

• Message type: E = Error

• Message class: W0 - Customizing - ISR

• Message number: 158

• Message text: Entry & is not permitted for the field name

Generated Include to Extension - PETERG - 06.06.2000
INCLUDE HPR OBJECT DOKU ID TX LANGUAGE D

ENDIF

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message W0158 - Entry & is not permitted for the field name ?

  SAP Error Message:
  
  W0158 - Entry & is not permitted for the field name
  
  Cause:
  This warning message occurs when you try to enter a value in a field that is not allowed according to the field's validation rules or input restrictions. The ampersand (&) symbol (or the specific character shown in the message) is not permitted as an input for that particular field.
  Common reasons include:  
  
  The field is restricted to certain characters (e.g., alphanumeric only, no special characters).  
  The field is a key field or identifier that must follow a strict format.  
  Input validation logic or domain restrictions prevent the use of special characters like &.  
  The field is linked to a search help or domain that excludes such characters.
  
  
  Solution:
  
  
  Check Allowed Characters:
  
  Review the field's data element/domain in the ABAP Dictionary (transaction SE11) to understand the allowed character set or input format.
  
  
  Correct Input:
  
  Enter a value that complies with the allowed format. Avoid special characters like & if they are not permitted.
  
  
  Adjust Validation (if applicable):
  
  If you are a developer or have authorization, and the business process requires the use of such characters, you may:  
  
  Modify the domain or data element to allow the character.  
  Adjust input validation logic or user-exit/BAdI that restricts the input.  
  Update search helps or input checks accordingly.
  
  
  
  Consult Documentation or Functional Team:
  
  Sometimes the restriction is intentional due to business rules. Confirm with the functional team or SAP documentation whether the input is valid.
  
  
  
  Related Information:
  
  Message Class: W0 (or similar, depending on system)  
  Transaction: The message can appear in various transactions depending on the field involved.  
  ABAP Dictionary: Use SE11 to check the field's domain and data element.  
  Input Help: Check if the field has a search help (F4 help) that restricts input.  
  SAP Notes: Search SAP Support Portal for notes related to message W0158 for specific modules or scenarios.
  
  
  Example:
  If you try to enter ABC&123 in a material number field that only allows alphanumeric characters without special symbols, SAP will issue message W0158 indicating that & is not permitted.
  
  If you provide the specific transaction or field name, I can help with more targeted advice.