How To Fix CL171 - Parameter input not processed because change number is present

CL171 - Overview

• Message type: E = Error

• Message class: CL - Classification

• Message number: 171

• Message text: Parameter input not processed because change number is present

What causes this issue?

You have entered a change number and selected parameter input. This is
a contradiction in terms. Only the change number is read.

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

System Response

How to fix this error?

Correct your entries.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL171 - Parameter input not processed because change number is present ?

  The SAP error message CL171, which states "Parameter input not processed because change number is present," typically occurs in the context of working with classification data in SAP. This error is related to the use of change numbers in the classification system, which are used to manage changes to classification data over time.
  
  Cause:
  The error arises when you attempt to make changes to a classification object (like a material or a characteristic) while a change number is active. Change numbers are used to control the validity of changes in SAP, ensuring that modifications are tracked and can be reverted if necessary. When a change number is active, certain operations may be restricted to maintain data integrity.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Active Change Number: Verify if there is an active change number that is preventing the modification. You can do this by checking the change number status in