How To Fix PK518 - Function only allowed for classic or signal-driven control cycles

SAP Error Message - Details

• Message type: E = Error

• Message class: PK - Production - KANBAN

• Message number: 518

• Message text: Function only allowed for classic or signal-driven control cycles

What causes this issue?

A change in the control cycle category is only allowed for classic and
event-driven control cycles.

System Response

The change in the control cycle category transforms a classic control
cycle into an event-driven one and vice-versa.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PK518 - Function only allowed for classic or signal-driven control cycles ?

  The SAP error message PK518 ("Function only allowed for classic or signal-driven control cycles") typically occurs in the context of Production Planning (PP) or Advanced Planning and Optimization (APO) when you are trying to execute a function that is not compatible with the type of control cycle you are using.
  Cause:
  The error is triggered when you attempt to perform an operation that is only applicable to classic or signal-driven control cycles, but your current configuration is set to a different type of control cycle (e.g., heuristic or optimization-based control cycles). This can happen in scenarios such as:
  
  Trying to execute a planning function that is not supported by the current control cycle.
  The control cycle is set up incorrectly or is not aligned with the planning strategy you are trying to implement.
  
  Solution:
  To resolve the PK518 error, you can take the following steps:
  
  
  Check Control Cycle Type: Verify the type of control cycle you are using. Ensure that it is either a classic or signal-driven control cycle if you intend to use the function that triggered the error.
  
  
  Adjust Planning Functions: If you are using a control cycle that does not support the function, consider switching to a compatible control cycle or modifying your planning approach to align with the capabilities of the current control cycle.
  
  
  Review Configuration: Check the configuration settings for the control cycle in the SAP system. Ensure that all settings are correctly defined and that the control cycle is set up to handle the operations you are trying to perform.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for detailed information on the specific functions and their compatibility with different control cycle types.
  
  
  Seek Expert Assistance: If you are unable to resolve the issue, consider reaching out to your SAP support team or a consultant with expertise in SAP PP/APO for further assistance.
  
  
  Related Information:
  
  Control Cycles: Understand the different types of control cycles in SAP and their specific use cases. Classic control cycles are typically used for simpler planning scenarios, while signal-driven control cycles are used for more complex scenarios involving signals and events.
  Planning Functions: Familiarize yourself with the various planning functions available in SAP and their requirements. This will help you choose the right function for your control cycle.
  SAP Notes: Check for any relevant SAP Notes that may address this error or provide additional guidance on control cycles and planning functions.
  
  By following these steps, you should be able to identify the cause of the PK518 error and implement a suitable solution.