How To Fix CPWB251 - Reference sequence is not suitable

SAP Error Message - Details

• Message type: E = Error

• Message class: CPWB - General Workbench Messages

• Message number: 251

• Message text: Reference sequence is not suitable

What causes this issue?

You want to create a sequence and have entered an alternative sequence
as a reference sequence. However, an alternative sequence is not
allowed to be a reference sequence.

System Response

The sequence was not created.

How to fix this error?

For a sequence always choose the standard sequence or a parallel
sequence as reference sequence.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CPWB251 - Reference sequence is not suitable ?

  The SAP error message CPWB251, which states "Reference sequence is not suitable," typically occurs in the context of production planning and control, particularly when working with the Capacity Planning Workbench (CPWB) or similar functionalities in SAP.
  Cause:
  The error CPWB251 usually arises due to one or more of the following reasons:
  
  
  Incompatible Reference Sequence: The reference sequence you are trying to use may not be compatible with the current planning scenario or the specific production order. This could be due to differences in the characteristics of the reference sequence and the requirements of the order.
  
  
  Missing or Incorrect Data: There may be missing or incorrect data in the master data (like routing, work center, or production version) that is required for the reference sequence to be valid.
  
  
  Configuration Issues: There might be configuration settings in the system that prevent the reference sequence from being used in the current context.
  
  
  Status of the Order: The production order or planning order may be in a status that does not allow for the use of the reference sequence.
  
  
  Solution:
  To resolve the CPWB251 error, you can take the following steps:
  
  
  Check Reference Sequence: Verify that the reference sequence you are trying to use is appropriate for the production order. Ensure that it matches the requirements of the order in terms of operations, work centers, and other relevant parameters.
  
  
  Review Master Data: Check the master data related to the production order, including routing, work centers, and production versions. Ensure that all necessary data is complete and correctly configured.
  
  
  Configuration Review: If you suspect a configuration issue, review the settings in the SAP system related to capacity planning and production order processing. Consult with your SAP configuration team if necessary.
  
  
  Order Status: Ensure that the production order is in a status that allows for the use of the reference sequence. If the order is already released or in production, you may need to adjust the order status or create a new order.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for more specific guidance related to the error message and the context in which it occurs.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CO01 (Create Production Order), CO02 (Change Production Order), and CM21 (Capacity Leveling) to navigate and troubleshoot effectively.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered and resolved similar issues.
  Training and Documentation: Consider training sessions or documentation on production planning and capacity management in SAP to better understand the underlying processes and configurations.
  
  By following these steps, you should be able to identify the cause of the CPWB251 error and implement a suitable solution.