How To Fix CN777 - Object (network, activity, item) is invalid

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 777

• Message text: Object (network, activity, item) is invalid

What causes this issue?

To be able to assign a document to a material component, the system
requires the network and activity number, and the item from the
material component.

System Response

The document cannot be assigned.

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN777 - Object (network, activity, item) is invalid ?

  The SAP error message CN777 indicates that the specified object (network, activity, or item) is invalid. This error typically occurs in the context of Project System (PS) or Controlling (CO) modules when trying to access or manipulate a network, activity, or item that does not exist or is not correctly defined in the system.
  Causes of CN777 Error
  
  Non-Existent Object: The object you are trying to access (network, activity, or item) does not exist in the system.
  Incorrect Object Type: The object type you are trying to use may not match the expected type (e.g., trying to use an activity number where a network number is expected).
  Authorization Issues: The user may not have the necessary authorizations to access the specified object.
  Deleted or Inactive Objects: The object may have been deleted or marked as inactive in the system.
  Incorrect Input: There may be a typographical error in the object number or name being entered.
  
  Solutions to CN777 Error
  
  
  Verify Object Existence:
  
  Check if the network, activity, or item exists in the system. You can do this by navigating to the relevant transaction (e.g., CN21 for networks, CN22 for activities) and searching for the object.
  
  
  
  Check Object Type:
  
  Ensure that you are using the correct object type. For example, if you are trying to reference an activity, make sure you are not mistakenly using a network number.
  
  
  
  Review Authorizations:
  
  Ensure that the user has the necessary authorizations to access the object. You may need to consult with your SAP security team to verify this.
  
  
  
  Check for Deletion or Inactivity:
  
  If the object was recently deleted or marked as inactive, you may need to recreate it or reactivate it.
  
  
  
  Correct Input Errors:
  
  Double-check the input for any typographical errors. Ensure that you are entering the correct object number or name.
  
  
  
  Use Transaction Codes:
  
  Use relevant transaction codes to check the status of the object:
  
  CN21: Create Network
  CN22: Change Network
  CN23: Display Network
  CJ20N: Project Builder (to view the project structure)
  
  
  
  
  
  Related Information
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error. You can search the SAP Support Portal for specific notes that may address the CN777 error.
  Documentation: Review the SAP documentation for the Project System module to understand the structure and requirements for networks, activities, and items.
  Community Forums: Consider visiting SAP community forums or discussion boards where other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the cause of the CN777 error and implement a solution to resolve it.