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

SAP Error Message - Details

• 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

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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 sure it aligns with the method you intend to use. You may need to change the strategy in the material master or the planning configuration.
  
  
  Review User Input: If you are entering data manually, double-check your selections to ensure that you are not inadvertently selecting options that conflict with each other.
  
  
  Consult Documentation: Refer to SAP documentation or help files related to the specific transaction or planning method you are using for more detailed guidance.
  
  
  Seek Help from SAP Support: If the issue persists, consider reaching out to your SAP support team or consulting SAP Notes for any known issues or patches related to this error.
  
  
  Related Information:
  
  Transaction Codes: The error may occur in various transaction codes related to MRP, such as MD01 (MRP Run), MD02 (Single-item, Multi-level planning), etc.
  Planning Strategies: Familiarize yourself with the different planning strategies available in SAP, such as Make-to-Stock (MTS) and Make-to-Order (MTO), and how they relate to top-down and bottom-up planning.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution effectively.