How To Fix CN188 - A reference object cannot be entered for the method 'Save'

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 188

• Message text: A reference object cannot be entered for the method 'Save'

What causes this issue?

A reference number for an object or an object key has been entered in
the command table for the "Save" command.

System Response

INCLUDE NA_ALLG_NOVERARBEITUNG OBJECT DOKU ID TX
&NOTE&
The "Save" command always refers to all the objects and methods that
were transferred.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN188 - A reference object cannot be entered for the method 'Save' ?

  The SAP error message CN188, which states "A reference object cannot be entered for the method 'Save'," typically occurs in the context of SAP Project System (PS) or related modules when there is an issue with the data being processed in a transaction or function module.
  Cause:
  
  Incorrect Object Type: The error often arises when the system expects a specific type of object (like a network, activity, or project) but receives a reference object that is not valid for the operation being performed.
  Missing or Incomplete Data: If the required fields or data for the object are not filled out correctly, the system may not be able to process the save operation.
  Configuration Issues: There may be configuration settings in the project system that are not aligned with the data being processed.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to perform the save operation on the specified object.
  
  Solution:
  
  Check Object Type: Ensure that the object you are trying to save is of the correct type and is valid for the operation. Verify that you are not mistakenly trying to save a reference object where a different object type is expected.
  Validate Data: Review the data you are entering. Make sure all mandatory fields are filled out correctly and that the data adheres to the expected formats.
  Review Configuration: Check the configuration settings in the SAP system related to the Project System. Ensure that the settings are correct and that they match the data you are trying to save.
  Authorization Check: Verify that you have the necessary authorizations to perform the save operation. If not, contact your system administrator to obtain the required permissions.
  Debugging: If you have access to debugging tools, you can analyze the program flow to identify where the error is being triggered. This may provide insights into what is going wrong.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error message. There may be patches or updates that resolve known issues.
  Transaction Codes: Familiarize yourself with relevant transaction codes in the Project System (like CJ20N for project management) to ensure you are using the correct transactions.
  Documentation: Review SAP documentation or user manuals related to the Project System for additional context on object handling and saving methods.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a technical consultant who can provide more in-depth assistance.