How To Fix MD128 - Start date not valid for fixed receipts

MD128 - Overview

• Message type: E = Error

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

• Message number: 128

• Message text: Start date not valid for fixed receipts

What causes this issue?

You want to take firmed receipts/issues into account and have scheduled
the start of the planning period.

System Response

The start date of the planning period is valid for independent
requirements but not for firmed receipts/issue.
Otherwise, production orders, for example, could be included in the
planning run without considering the reservations earlier on the time
axis.

How to fix this error?

It is less effective to set a start date in the future that takes
firmed receipts/issues into account.
It is more effective to schedule a start date in the past if the
independent requirements in the past (but after start date) are also to
be taken into account.
If a start date is not scheduled, independent requirements in the past
are not taken into account.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD128 - Start date not valid for fixed receipts ?

  The SAP error message MD128 "Start date not valid for fixed receipts" typically occurs in the context of Material Requirements Planning (MRP) when there is an issue with the scheduling of fixed receipts, such as production orders or purchase orders. This error indicates that the start date for the fixed receipt is not valid based on the planning parameters or the current date.
  Causes:
  
  Invalid Date Configuration: The start date for the fixed receipt may be set in the past or outside the acceptable range defined in the MRP settings.
  Planning Parameters: The planning parameters for the material may not be set correctly, leading to conflicts in scheduling.
  Lead Times: The lead times defined for production or procurement may not align with the start date, causing the system to reject the date.
  Calendar Settings: The factory calendar or holiday settings may affect the validity of the start date.
  Material Status: The material may have a status