How To Fix CN819 - No work center assigned to successor

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 819

• Message text: No work center assigned to successor

What causes this issue?

You want to calculate the time interval of the relationship as a
percentage of the duration of the successor. But no work center has
been entered for this activity and therefore no calendar is available
to perform this calculation.

System Response

INCLUDE 'NA_ALLG_FUNKTION' OBJECT DOKU ID TX
If you have not entered a work center for the successor, the system
uses the factory calendar to calculate the time interval that you have
maintained in the network header or the header of the standard network.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN819 - No work center assigned to successor ?

  The SAP error message CN819 ("No work center assigned to successor") typically occurs in the context of project management or production planning when there is an issue with the assignment of work centers in a network or activity within a project. This error indicates that the system cannot find a work center assigned to a successor activity, which is necessary for scheduling and resource allocation.
  Cause:
  
  Missing Work Center Assignment: The successor activity in the network does not have a work center assigned to it.
  Incorrect Configuration: The configuration of the project or network may not be set up correctly, leading to missing links between activities and work centers.
  Data Entry Errors: There may be errors in the data entry for the project or network activities, such as incorrect or incomplete information.
  Network Structure Issues: The structure of the network may not be properly defined, leading to issues in identifying successors and their corresponding work centers.
  
  Solution:
  
  
  Assign Work Center:
  
  Go to the activity or successor in the project or network.
  Ensure that a valid work center is assigned to the successor activity. This can typically be done in the activity details screen.
  
  
  
  Check Network Configuration:
  
  Review the overall configuration of the network to ensure that all activities and their relationships are correctly defined.
  Ensure that all predecessor and successor relationships are properly established.
  
  
  
  Validate Data Entry:
  
  Check for any data entry errors in the project or network activities. Ensure that all required fields are filled out correctly.
  If necessary, re-enter the data for the affected activities.
  
  
  
  Use Transaction Codes:
  
  Use transaction codes like CN21 (Create Network) or CN22 (Change Network) to review and modify the network structure and assignments.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance on work center assignments and network management.
  
  
  
  Testing:
  
  After making changes, test the network or project to ensure that the error is resolved and that scheduling and resource allocation are functioning correctly.
  
  
  
  Related Information:
  
  Work Center: A work center in SAP is a location where work is performed, and it is associated with specific resources (like machines or labor).
  Network Activities: In project management, activities are linked in a network to represent the sequence of tasks and their dependencies.
  SAP Modules: This error is often encountered in modules related to Project System (PS) and Production Planning (PP).
  
  If the issue persists after following these steps, it may be beneficial to consult with an SAP expert or your organization's SAP support team for further assistance.