How To Fix M3078 - Scheduling margin key & is not defined in any plant

M3078 - Overview

• Message type: E = Error

• Message class: M3 - Material Master

• Message number: 078

• Message text: Scheduling margin key & is not defined in any plant

What causes this issue?

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Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message M3078 - Scheduling margin key & is not defined in any plant ?

  The SAP error message M3078 indicates that a scheduling margin key is not defined for any plant in the system. This error typically arises during the planning or scheduling processes in SAP, particularly in the context of production planning (PP) or materials management (MM).
  
  Cause:
  The error occurs when:
  
  A scheduling margin key is assigned to a material or production order, but there is no corresponding definition of that key in the system.
  The scheduling margin key is not maintained in the configuration for the relevant plant or plants.
  The scheduling margin key may have been deleted or not properly set up in the system.
  
  
  Solution:
  To resolve the M3078 error, follow these steps:
  
  
  Check the Scheduling Margin Key:
  
  Go to the transaction code OMD1 (or navigate through the menu: Logistics > Production > Production Planning > Master Data > Scheduling Margin Key).
  Verify if the scheduling margin key in question is defined and active.
  
  
  
  Define the Scheduling Margin Key:
  
  If the