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

MD426 - Overview

• 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,