How To Fix TR128 - The character combinations /// //* //& //C or //L are not allowed

TR128 - Overview

• Message type: E = Error

• Message class: TR - Change and Transport System

• Message number: 128

• Message text: The character combinations /// //* //& //C or //L are not allowed

What causes this issue?

The field contains an invalid character combination.
For performance reasons, the replacement characters // cannot appear
immediately before other replacement characters.

System Response

Entry rejected.

How to fix this error?

Do not use this replacement formulation here.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TR128 - The character combinations /// //* //& //C or //L are not allowed ?

  The SAP error message TR128 indicates that certain character combinations are not allowed in the context of transaction codes or other identifiers within the SAP system. Specifically, the combinations mentioned (///, //*, //&, //C, //L) are reserved or restricted for specific uses and cannot be used in user-defined transaction codes or other identifiers.
  
  Cause:
  The error typically occurs when a user attempts to create or modify a transaction code, program name, or other identifiers using one of the restricted character combinations. These combinations are often reserved for system use or have special meanings within the SAP environment.
  
  Solution:
  To resolve this error, you should:
  
  
  Check the Input: Review the transaction code or identifier you are trying to create or modify. Ensure that it does not contain any of the restricted character combinations mentioned in the error message.
  
  
  Modify the Identifier: If your identifier includes any of the restricted combinations, change it to a valid format. Use