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

W0158 - Overview

• 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.

W0158 - Details

• 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