How To Fix CK870 - Iteration of cycle &1 oscillates by &2 &3

SAP Error Message - Details

• Message type: E = Error

• Message class: CK - Product Costing Messages

• Message number: 870

• Message text: Iteration of cycle &1 oscillates by &2 &3

Self-Explanatory Message

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• What is the cause and solution for SAP error message CK870 - Iteration of cycle &1 oscillates by &2 &3 ?

  The SAP error message CK870, which states "Iteration of cycle &1 oscillates by &2 &3," typically occurs during the costing process in SAP, particularly when dealing with cost estimates in the Controlling (CO) module. This error indicates that there is an issue with the cost calculation cycle, where the system is unable to converge on a solution due to oscillation in the cost estimates.
  Cause:
  
  
  Circular Dependencies: The most common cause of this error is circular dependencies in the cost calculation cycle. This means that the cost elements or activities are interdependent in such a way that the system cannot determine a stable cost.
  
  
  Incorrect Configuration: Misconfiguration of cost elements, cost centers, or activity types can lead to oscillation. This can happen if the settings do not align with the intended cost flow.
  
  
  Data Issues: Inconsistent or incorrect data in master records (like cost centers, activity types, or material master) can also lead to this error.
  
  
  Complex Costing Cycles: If the costing cycle is too complex or has too many iterations, it may lead to oscillation.
  
  
  Solution:
  
  
  Review Costing Cycle: Check the costing cycle configuration for any circular dependencies. Ensure that the cost elements and activities are set up correctly and do not reference each other in a way that creates a loop.
  
  
  Simplify the Cycle: If possible, simplify the costing cycle by reducing the number of iterations or breaking down complex calculations into simpler components.
  
  
  Check Master Data: Verify the master data for cost centers, activity types, and other relevant records to ensure they are correctly configured and do not contain any inconsistencies.
  
  
  Adjust Parameters: Sometimes, adjusting the parameters for the costing run (like the maximum number of iterations) can help resolve the issue.
  
  
  Use Alternative Costing Methods: If the problem persists, consider using alternative costing methods or approaches that do not involve the problematic cycle.
  
  
  Consult SAP Notes: Check for any relevant SAP Notes or updates that may address this specific error or provide additional guidance.
  
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like CK11N (Create Cost Estimate) or CK40N (Costing Run) to analyze and adjust the costing setup.
  Costing Variants: Review the costing variants being used to ensure they are appropriate for the materials or activities being costed.
  Documentation: Refer to SAP documentation or help guides for detailed information on configuring costing cycles and resolving related issues.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with an SAP expert or your organization's SAP support team for further assistance.