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

SAP Error Message - Details

• 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 the relevant transaction (e.g., CL02 for class maintenance).
  
  
  Deactivate Change Number: If you have the necessary permissions, you can deactivate the change number. This can typically be done in the change number management transaction (e.g., CNO1 or CNO2). Make sure to follow your organization's procedures for handling change numbers.
  
  
  Use a New Change Number: If you need to make changes while a change number is active, consider creating a new change number for your modifications. This allows you to make the necessary changes without affecting the current active change number.
  
  
  Consult Documentation: Review SAP documentation or your organization's guidelines on using change numbers and classification data. This can provide additional context and procedures specific to your environment.
  
  
  Contact Support: If you are unsure about how to proceed or if the issue persists, consider reaching out to your SAP support team or a consultant who specializes in SAP classification and change management.
  
  
  Related Information:
  
  Change Management in SAP: Understanding how change numbers work in SAP is crucial for managing classification data effectively. Change numbers help in tracking changes and ensuring that only authorized modifications are made.
  Classification System: Familiarize yourself with the classification system in SAP, including how classes, characteristics, and objects are managed.
  Transaction Codes: Common transaction codes related to classification and change management include:
  
  CL01: Create Class
  CL02: Change Class
  CL03: Display Class
  CNO1: Create Change Number
  CNO2: Change Change Number
  CNO3: Display Change Number
  
  
  
  By following these steps and understanding the context of the error, you should be able to resolve the CL171 error effectively.