How To Fix CY726 - & has no connection with predecessor & in res. netw. struct. & in plant &

SAP Error Message - Details

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 726

• Message text: & has no connection with predecessor & in res. netw. struct. & in plant &

What causes this issue?

The header data of the process order specifies that the operations must
be scheduled on a particular resource network structure.
However, the operation has been scheduled on a resource that is not
defined as the successor resource of the resource on which a
"predecessor" operation is to be carried out.

How to fix this error?

Please schedule the operations in the sequence defined by the resource
network structure.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CY726 - & has no connection with predecessor & in res. netw. struct. & in plant & ?

  The SAP error message CY726 typically indicates an issue related to the network structure in a project or production planning context. This error suggests that there is a problem with the relationship between activities in a network, specifically that a certain activity has no connection with its predecessor in the network structure.
  Cause:
  
  Missing Predecessor Relationship: The activity in question is expected to have a predecessor, but it does not. This can happen if the predecessor activity was deleted or if the relationship was not properly defined.
  Incorrect Network Configuration: The network structure may not be set up correctly, leading to disconnections between activities.
  Data Integrity Issues: There may be inconsistencies in the data, such as missing or incorrect entries in the network or activity definitions.
  
  Solution:
  
  
  Check Activity Relationships:
  
  Go to the network in question and check the relationships between activities. Ensure that all activities have the correct predecessor and successor relationships defined.
  If an activity is missing a predecessor, you may need to add one manually.
  
  
  
  Review Network Structure:
  
  Open the network structure in the SAP system and verify that all activities are correctly linked. Look for any activities that are isolated or not connected to the main flow.
  If necessary, recreate the network or adjust the existing one to ensure proper connections.
  
  
  
  Data Validation:
  
  Perform a data validation check to ensure that all entries related to the network and activities are correct and complete.
  Check for any inconsistencies or missing data that could be causing the issue.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on network structures and activity relationships.
  
  
  
  SAP Notes and Support:
  
  Check the SAP Support Portal for any relevant notes or patches that may address this specific error message.
  If the issue persists, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CN21 (Create Network), CN22 (Change Network), or CN41 (Display Network) to manage and review network structures.
  Project Management: Understanding the principles of project management within SAP, including how to define and manage networks and activities, can help prevent such issues.
  Training and Resources: Consider training sessions or resources on SAP Project System (PS) or Production Planning (PP) modules to better understand network structures and their configurations.
  
  By following these steps, you should be able to identify and resolve the issue related to the CY726 error message in SAP.