How To Fix CN659 - First selected relationship already reached

CN659 - Overview

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 659

• Message text: First selected relationship already reached

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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CN659 - Details

• The SAP error message CN659 ("First selected relationship already reached") typically occurs in the context of project management and network planning within SAP, particularly when dealing with relationships between activities in a project.
  
  Cause:
  This error usually arises when you are trying to create or modify a relationship between activities in a project network, and the system detects that the relationship you are trying to establish has already been defined. Essentially, it indicates that the first selected relationship (the predecessor or successor) has already been reached or established, and you cannot create a duplicate or conflicting relationship.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Relationships: Review the existing relationships between the activities in your project. Ensure that you are not trying to create a duplicate relationship. You can do this by navigating to the project network and examining the relationships defined for the activities involved.
  
  
  Modify Existing Relationships: If you