How To Fix MD426 - &1: &2 (P3)

SAP Error Message - Details

• Message type: E = Error

• Message class: MD - Material Requirements Planning (MRP)

• Message number: 426

• Message text: &1: &2 (P3)

What causes this issue?

In Customizing, no specification has been made to allow the adjustment
of the order start date to the production start date.
However, the production start date calculated using the routing lies
before the order start date calculated using the in-house processing
time in the material master record.
This could mean that the times in the material master record or in the
routing are incorrect. If the in-house processing time in the material
master record is too small, this may lead to material shortages.

System Response

This exception is displayed in the MRP list and in the current
stock/requirements list.

How to fix this error?

Check the times in the material master record and in the routing.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD426 - &1: &2 (P3) ?

  The SAP error message MD426 typically relates to issues in the Material Requirements Planning (MRP) process, specifically concerning the planning of materials. The message format you provided indicates that it is a warning or error related to the planning run.
  Cause:
  The error message MD426 usually indicates that there is a problem with the planning parameters or data for a specific material. Common causes include:
  
  Missing Master Data: The material master data may be incomplete or missing essential information, such as MRP type, lot size, or procurement type.
  Incorrect MRP Settings: The settings in the MRP view of the material master may not be configured correctly.
  Planning File Entries: There may be issues with the planning file entries that prevent the system from processing the material correctly.
  Stock Levels: The stock levels may not meet the requirements for the planned orders, leading to discrepancies.
  Demand and Supply Mismatch: There may be a mismatch between demand and supply, causing the planning run to fail.
  
  Solution:
  To resolve the MD426 error, you can take the following steps:
  
  
  Check Material Master Data:
  
  Go to the material master (transaction code MM03) and verify that all necessary fields in the MRP view are filled out correctly.
  Ensure that the MRP type, lot size, and procurement type are set appropriately.
  
  
  
  Review MRP Settings:
  
  Check the MRP settings in the configuration (transaction code SPRO) to ensure they align with your business processes.
  Make sure that the planning parameters are set correctly for the material.
  
  
  
  Analyze Planning File Entries:
  
  Use transaction code MD21 to check the planning file entries for the material. Ensure that the entries are correct and up to date.
  
  
  
  Check Stock Levels:
  
  Review the stock levels for the material using transaction code MMBE to ensure that there is sufficient stock to meet the demand.
  
  
  
  Run MRP Again:
  
  After making the necessary corrections, run the MRP again using transaction code MD01 or MD02 to see if the error persists.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant notes or updates related to the MD426 error message, as there may be specific patches or updates that address known issues.
  
  
  
  Related Information:
  
  
  Transaction Codes: 
  
  MM03 (Display Material Master)
  MD01 (MRP Run)
  MD02 (MRP Run for Single Material)
  MD21 (Display Planning File Entries)
  MMBE (Stock Overview)
  
  
  
  SAP Documentation: Refer to the official SAP documentation for detailed information on MRP processes and error handling.
  
  
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to identify and resolve the underlying cause of the MD426 error message in SAP.