How To Fix WT129 - Target stock is calculated dynamically. Your entry will be ignored

SAP Error Message - Details

• Message type: E = Error

• Message class: WT - Retail: Replenishment

• Message number: 129

• Message text: Target stock is calculated dynamically. Your entry will be ignored

What causes this issue?

The <DS:DE.DISMM>MRP type</> for this <DS:DE.WRKUNNR>recipient</> that
the target stock should be calculated dynamically during the
replenishment planning run.

System Response

The system ignores your entry.

How to fix this error?

If you want the system to use the target stock you entered nonetheless,
you must assign the material an MRP type for this recipient, whereby
the field <LS>Forecast indicator</> has a value other than '+'
(compulsory forecast).

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WT129 - Target stock is calculated dynamically. Your entry will be ignored ?

  Certainly! Here's a detailed explanation for the SAP error message WT129 - "Target stock is calculated dynamically. Your entry will be ignored."
  
  Error Message: WT129
  Text:
  
  Target stock is calculated dynamically. Your entry will be ignored.
  
  Cause:
  This message occurs in SAP Warehouse Management (WM) or Inventory Management (IM) when you try to manually enter or change the target stock quantity for a storage bin or material, but the system is configured to calculate the target stock dynamically.
  
  The target stock is a predefined quantity that should be maintained in a storage bin.
  In some configurations, the target stock is not maintained manually but is calculated dynamically based on certain rules or replenishment strategies.
  When the system detects that the target stock is set to be calculated dynamically (e.g., via a replenishment strategy or a dynamic calculation indicator), it ignores any manual entries for target stock.
  Hence, your manual entry is overridden or ignored, and the system issues this message.
  
  
  When does this happen?
  
  When maintaining storage bin master data or during inventory adjustments.
  When using replenishment strategies like dynamic target stock calculation in WM.
  When the storage bin or material master is set up with dynamic target stock calculation enabled.
  
  
  Solution:
  
  
  Check Configuration:
  
  Verify if the storage bin or material is set up for dynamic target stock calculation.
  This is usually controlled in the storage bin master data or via replenishment strategies in WM.
  
  
  
  Adjust Your Process:
  
  If the target stock is calculated dynamically, do not try to enter it manually.
  Instead, adjust the parameters or rules that control the dynamic calculation (e.g., reorder point, safety stock, replenishment strategy).
  
  
  
  Change Configuration (if manual entry is required):
  
  If you want to maintain the target stock manually, you need to disable the dynamic calculation for that storage bin or material.
  This might involve changing the replenishment strategy or indicator in the storage bin master data or material master.
  
  
  
  Consult with WM/IM Consultant:
  
  Because this involves configuration, it is advisable to consult with your SAP WM or IM consultant to understand the impact of changing the dynamic calculation settings.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  LS01N / LS02N / LS03N — Create/Change/Display Storage Bin
  MM02 — Change Material Master (for WM views)
  SPRO — IMG configuration for Warehouse Management and Inventory Management
  
  
  
  Configuration Path:
  
  Logistics Execution ? Warehouse Management ? Master Data ? Storage Bin ? Define Storage Bin Types and Replenishment Strategies
  Logistics Execution ? Warehouse Management ? Strategies ? Replenishment ? Define Replenishment Strategies
  
  
  
  Notes:
  
  Dynamic target stock calculation is often used to optimize inventory levels automatically.
  Manual entries are ignored to prevent conflicts between manual and system-driven inventory control.
  
  
  
  
  Summary:
  
  
  
  Aspect
  Description
  
  
  
  
  Cause
  Target stock is set to be calculated dynamically; manual entries are ignored by the system.
  
  
  Effect
  Manual input of target stock is ignored; system uses dynamic calculation instead.
  
  
  Solution
  Do not enter target stock manually or disable dynamic calculation if manual entry is needed.
  
  
  Related Config
  Storage bin master data, replenishment strategies, WM configuration.
  
  
  
  
  If you need help with specific configuration steps or want to see how to disable dynamic target stock calculation, please let me know!