How To Fix M7856 - Select only top-down or bottom-up

M7856 - Overview

• Message type: E = Error

• Message class: M7 - Inventory Management and Physical Inventory

• Message number: 856

• Message text: Select only top-down or bottom-up

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message M7856 - Select only top-down or bottom-up ?

  The SAP error message M7856 "Select only top-down or bottom-up" typically occurs in the context of material requirements planning (MRP) or production planning when users are trying to perform a planning run or execute a specific transaction that involves planning strategies.
  
  Cause:
  This error arises when the system detects that the user is trying to use both top-down and bottom-up planning methods simultaneously, which is not allowed. In SAP, top-down planning refers to a method where the overall demand is broken down into specific components, while bottom-up planning starts with the individual components and aggregates them to meet overall demand. The system requires a clear choice between these two approaches.
  
  Solution:
  To resolve this error, you should:
  
  
  Check Planning Parameters: Review the planning parameters set in the transaction you are using. Ensure that you have selected either top-down or bottom-up planning, but not both.
  
  
  Adjust Planning Strategy: If you are using a specific planning strategy, make