How To Fix W#423 - MRP type &1 not found for material &2.

W#423 - Overview

• Message type: E = Error

• Message class: W# -

• Message number: 423

• Message text: MRP type &1 not found for material &2.

Self-Explanatory Message

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W#423 - Details

• The SAP error message W#423 indicates that the Material Requirements Planning (MRP) type specified for a material is not found in the system. This error typically occurs during MRP runs or when trying to perform MRP-related transactions for a material that does not have a valid MRP type assigned.
  
  Cause:
  
  Missing MRP Type: The MRP type for the specified material is not defined in the system.
  Incorrect Material Master Data: The material master record may not have been properly set up, or the MRP type may have been deleted or not assigned.
  
  Configuration Issues: The MRP type may not be configured correctly in the system, or it may not be available in the relevant plant or storage location.
  
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the Material Master (Transaction Code: MM03).
  Enter the material number and check the MRP views (usually MRP 1, MRP 2, etc.) to see if an MRP type is assigned.
  If the MRP type is