How To Fix CN171 - Invalid version number

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 171

• Message text: Invalid version number

What causes this issue?

You have ebtered an invalid version number. The version number can be
invalid for the following reasons:
You have used special characters *, + or # in the version number.
You have no athorization for this version.
The version is inactive.

How to fix this error?

Use a valid version number or contact your system administration, if
you do not have the necessary authorizations.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN171 - Invalid version number ?

  The SAP error message CN171 "Invalid version number" typically occurs in the context of project management or when dealing with versioning in SAP systems, particularly in the Project System (PS) module. This error indicates that the version number being referenced is not valid or does not exist in the system.
  Causes:
  
  Incorrect Version Number: The version number you are trying to use may not exist or may have been deleted.
  Data Inconsistency: There may be inconsistencies in the database or in the project structure that lead to the version number being unrecognized.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to access certain versions.
  System Configuration: The system may not be configured correctly to handle versioning for the specific project or object.
  
  Solutions:
  
  Check Version Number: Verify that the version number you are trying to use is correct and exists in the system. You can do this by checking the project version in the Project System.
  Create a New Version: If the version does not exist, consider creating a new version if that is appropriate for your project.
  Review Authorizations: Ensure that you have the necessary authorizations to access the version in question. You may need to contact your system administrator for assistance.
  Data Consistency Check: Run consistency checks on the project data to identify and resolve any inconsistencies. This can often be done using transaction codes like CJ20N or CJ02.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance related to versioning in the Project System.
  Contact Support: If the issue persists, consider reaching out to SAP support or your internal IT support team for further assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CJ20N (Project Builder), CJ02 (Change Project), and CJ03 (Display Project) to manage project versions.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify the cause of the CN171 error and implement a suitable solution.