How To Fix MD165 - Simulative opening balance (stock) not allowed with MRP areas

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 165

• Message text: Simulative opening balance (stock) not allowed with MRP areas

What causes this issue?

The use of MRP areas has been activated at client level.
Long-term planning with consideration of simulative opening stock is
not permitted as it is not possible to determine average plant stock at
MRP area level.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Choose another setting for the opening stock to be considered.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD165 - Simulative opening balance (stock) not allowed with MRP areas ?

  The SAP error message MD165, which states "Simulative opening balance (stock) not allowed with MRP areas," typically occurs in the context of Material Requirements Planning (MRP) when you are trying to perform a simulation run that involves opening balances for materials that are managed with MRP areas.
  Cause:
  The error arises because the system does not allow the use of simulative opening balances when MRP areas are defined for the material. MRP areas are used to manage stock and planning at a more granular level, and the simulation process does not support the concept of opening balances in this context.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Remove MRP Areas: If the use of MRP areas is not essential for your planning process, you can remove the MRP area settings for the material. This will allow you to use simulative opening balances without encountering the error.
  
  
  Use Actual Balances: Instead of using simulative opening balances, you can use actual stock balances. This means you should ensure that the stock levels are correctly updated in the system before running the MRP.
  
  
  Adjust Planning Parameters: Review the planning parameters and settings for the material in question. Ensure that they are configured correctly for your planning needs without conflicting with the MRP area settings.
  
  
  Consult Documentation: Check the SAP documentation or help resources for any specific guidelines related to MRP areas and simulative planning. There may be additional configuration steps or considerations that are relevant to your specific version of SAP.
  
  
  Contact SAP Support: If the issue persists and you cannot find a suitable solution, consider reaching out to SAP support for assistance. They can provide insights based on your specific system configuration and requirements.
  
  
  Related Information:
  
  MRP Areas: MRP areas allow for more detailed planning and stock management by dividing stock into different areas based on various criteria (e.g., storage location, production line).
  Simulative Planning: This is a planning run that allows you to simulate the effects of changes without affecting the actual stock or planning data.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context or fixes.
  
  By following these steps, you should be able to address the MD165 error and proceed with your MRP planning activities.