How To Fix AG851 - TM scheduling: no MBDAT determined; ATP confirm. not possible &1 &2 &3

SAP Error Message - Details

• Message type: E = Error

• Message class: AG - Nachrichten ATP-Server

• Message number: 851

• Message text: TM scheduling: no MBDAT determined; ATP confirm. not possible &1 &2 &3

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message AG851 - TM scheduling: no MBDAT determined; ATP confirm. not possible &1 &2 &3 ?

  The SAP error message AG851 indicates that there is an issue with the scheduling of transportation management (TM) due to the absence of a valid "MBDAT" (Material Availability Date) for the item in question. This error typically arises during the ATP (Available to Promise) confirmation process when the system cannot determine a suitable date for the material's availability.
  Cause:
  
  Missing or Incorrect Master Data: The material master data may not be correctly maintained, leading to the absence of the MBDAT.
  Planning Parameters: The planning parameters for the material may not be set up correctly, affecting the availability check.
  Transportation Planning: There may be issues with the transportation planning settings or the integration between SAP modules (like SD, MM, and TM).
  Stock Levels: There may be insufficient stock or no stock available for the material in the specified location.
  Lead Times: The lead times for procurement or production may not be defined, leading to the inability to calculate the MBDAT.
  
  Solution:
  
  Check Material Master Data: Ensure that the material master data is complete and correctly maintained. Pay special attention to the availability check settings.
  Review Planning Parameters: Verify that the planning parameters for the material are set correctly in the system.
  Check Stock Levels: Confirm that there is sufficient stock available for the material in the relevant storage location.
  Adjust Lead Times: Ensure that lead times for procurement and production are defined and realistic.
  Run Availability Check: Perform an availability check manually to see if the system can determine the MBDAT under different conditions.
  Review Transportation Settings: Check the transportation management settings to ensure that they are correctly configured and integrated with other modules.
  Consult SAP Notes: Look for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like MM03 (Material Master), MD04 (Stock/Requirements List), or /SCMTMS/PLN (Transportation Planning) to investigate the issue further.
  SAP Help Documentation: Refer to the SAP Help Portal for detailed documentation on transportation management and availability checks.
  Debugging: If the issue persists, consider debugging the process to identify where the MBDAT determination fails.
  
  If the problem continues after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in SAP TM and MM.