How To Fix QA254 - Maintenance of sample size is only permitted for lots without plan

SAP Error Message - Details

• Message type: E = Error

• Message class: QA - QM : Inspection lots

• Message number: 254

• Message text: Maintenance of sample size is only permitted for lots without plan

What causes this issue?

You can only enter the sample size manually if a plan is not available
as a basis for the quality inspection.

System Response

The input is ignored.

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.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message QA254 - Maintenance of sample size is only permitted for lots without plan ?

  The SAP error message QA254, which states "Maintenance of sample size is only permitted for lots without plan," typically occurs in the Quality Management (QM) module when you attempt to maintain or change the sample size for a quality inspection lot that is associated with a quality inspection plan.
  Cause:
  This error arises because the system restricts modifications to the sample size for inspection lots that are linked to a predefined inspection plan. When an inspection lot is created based on an inspection plan, the sample size is determined by the specifications in that plan, and any changes to the sample size must be made at the plan level rather than at the lot level.
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Inspection Lot Type: Verify if the inspection lot is created from an inspection plan. If it is, you cannot change the sample size directly in the inspection lot.
  
  
  Modify the Inspection Plan:
  
  If you need to change the sample size, you should do so in the associated inspection plan.
  Go to the inspection plan transaction (e.g., QP01 for creating or QP02 for changing an inspection plan).
  Update the sample size in the relevant characteristics of the inspection plan.
  
  
  
  Create a New Inspection Lot: If the inspection lot has already been created and you need a different sample size, you may need to create a new inspection lot with the desired sample size based on the updated inspection plan.
  
  
  Use a Different Lot Type: If you need to maintain sample sizes independently of an inspection plan, consider using a different lot type that does not require a plan.
  
  
  Related Information:
  
  Inspection Plans: Understand how inspection plans are structured and how they determine the parameters for inspection lots.
  Quality Management Configuration: Familiarize yourself with the configuration settings in the QM module, particularly those related to inspection lot creation and sample size determination.
  SAP Documentation: Refer to SAP Help documentation for detailed information on managing inspection lots and plans.
  
  By following these steps, you should be able to address the QA254 error and manage your sample sizes effectively within SAP.