How To Fix CN848 - Relationship cannot be created . & is an activity element

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 848

• Message text: Relationship cannot be created . & is an activity element

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN848 - Relationship cannot be created . & is an activity element ?

  The SAP error message CN848 ("Relationship cannot be created") typically occurs in the context of project management and network planning within SAP, particularly when dealing with activity elements in a project. This error indicates that there is an issue with creating a relationship (or dependency) between two activities in a project network.
  Causes of Error CN848
  
  
  Invalid Activity Type: The activity you are trying to link may not be of a valid type for creating relationships. For example, if you are trying to create a relationship with a milestone or a non-activity element, it may not be allowed.
  
  
  Incorrect Dates: The start and finish dates of the activities involved may not allow for a valid relationship. For instance, if the predecessor activity is scheduled to finish after the successor activity is scheduled to start, the relationship cannot be created.
  
  
  Missing or Incomplete Data: If the activity does not have all the required data filled in (like dates, durations, etc.), the system may prevent the creation of a relationship.
  
  
  Network Structure Issues: There may be issues with the overall structure of the project network, such as circular dependencies or conflicts with other relationships.
  
  
  Authorization Issues: Sometimes, the user may not have the necessary permissions to create relationships between activities.
  
  
  Solutions to Error CN848
  
  
  Check Activity Types: Ensure that both activities involved in the relationship are valid activity elements. If one of them is a milestone or another type, you may need to adjust your approach.
  
  
  Review Dates: Verify the start and finish dates of both activities. Make sure that the predecessor activity finishes before the successor activity starts.
  
  
  Complete Required Fields: Ensure that all necessary fields for both activities are filled out correctly. This includes dates, durations, and any other relevant information.
  
  
  Examine Network Structure: Look for any circular dependencies or conflicts in the project network. You may need to adjust the sequence of activities to resolve these issues.
  
  
  Check Authorizations: Confirm that you have the necessary permissions to create relationships between activities. If not, contact your SAP administrator for assistance.
  
  
  Use Transaction Codes: Utilize transaction codes like CN22 (Change Network) or CJ20N (Project Builder) to review and modify the project network and activities.
  
  
  Related Information
  
  SAP Documentation: Refer to the official SAP documentation for project management and network planning for more detailed information on activity relationships and network structures.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Community Forums: Engage with SAP community forums or user groups for insights and solutions from other users who may have encountered the same issue.
  
  By following these steps, you should be able to identify the cause of the CN848 error and implement a solution to create the desired relationship between activity elements in your SAP project.