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How To Fix WT131 - Forecast values for determining target stock do not exist


SAP Error Message - Details

  • Message type: E = Error

  • Message class: WT - Retail: Replenishment

  • Message number: 131

  • Message text: Forecast values for determining target stock do not exist

  • Show details Hide details
  • What causes this issue?

    According to the availability indicator, the target stock in the
    replenishment run is to be defined dynamically. The system could not
    define the forecast values for the relevant time period for this.
    You can display the available forecast values in the logistics data for
    the article master.

    System Response

    An error occurred at the end of the replenishment run for this item.

    How to fix this error?

    Execute a forecast so that the required forecast values are available.
    These values have to cover at least the following time periods:
    Start: planning time period + replenishment lead time
    End: planning time period + replenishment lead time + target range
    of coverage

    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 WT131 - Forecast values for determining target stock do not exist ?

    Certainly! Here's a detailed explanation for the SAP error message WT131: Forecast values for determining target stock do not exist:


    Error Message

    WT131: Forecast values for determining target stock do not exist


    Cause

    This error occurs in SAP's Warehouse Management (WM) or Inventory Management processes when the system tries to determine the target stock level based on forecast values, but no forecast data is available for the material in question.

    More specifically:

    • The system uses forecast values (usually from the Forecast Planning or Demand Planning module) to calculate the target stock level.
    • If the forecast data for the material and relevant period is missing or not maintained, the system cannot calculate the target stock.
    • This often happens during the execution of replenishment or planning runs where the target stock is derived from forecasted demand.

    When does it occur?

    • During warehouse replenishment or planning runs.
    • When using forecast-based target stock determination in WM or Inventory Management.
    • When the system expects forecast data but none is maintained for the material/location.

    Solution

    1. Maintain Forecast Data:

      • Ensure that forecast values exist for the material in the relevant planning horizon.
      • Forecast data can be maintained in:
        • Demand Planning (DP) / Forecasting module (transaction codes like /SAPAPO/SDP94 or /SAPAPO/SDP6 in APO).
        • Material Master Forecast fields (if using simpler forecasting).
        • Planning tables or custom forecast tables depending on your system setup.
    2. Check Planning Horizon:

      • Verify that the forecast data covers the period for which the target stock is being calculated.
      • Adjust the planning horizon or forecast periods if necessary.
    3. Review Configuration:

      • Check the configuration for target stock determination in WM or Inventory Management.
      • Confirm that the system is set to use forecast values and that the correct forecast source is assigned.
    4. Fallback or Default Values:

      • If forecast data is not available, consider setting default target stock values or using safety stock levels.
      • Alternatively, adjust the system to not rely solely on forecast data for target stock calculation.
    5. Data Consistency:

      • Run consistency checks on forecast data.
      • Ensure that the material master, storage location, and warehouse data are correctly maintained and linked.

    Related Information

    • Transaction Codes:

      • /SAPAPO/SDP94 - Interactive Planning (APO Demand Planning)
      • /SAPAPO/SDP6 - Planning Book (APO)
      • MD61 - Create Planned Independent Requirements
      • MD62 - Change Planned Independent Requirements
      • LT24 - WM Replenishment Monitor
      • LX01 - Inventory Management
    • SAP Notes:

      • Check SAP Notes related to forecast integration and WM replenishment for your SAP version.
      • Example: SAP Note 1234567 (hypothetical) might address forecast integration issues.
    • Configuration Paths:

      • Logistics Execution ? Warehouse Management ? Strategies ? Replenishment ? Define Target Stock Determination
      • Logistics ? Production ? Material Requirements Planning ? Forecasting
    • Related Concepts:

      • Forecast-based planning
      • Target stock determination
      • Warehouse replenishment strategies
      • Demand Planning integration with WM

    Summary

    Aspect Details
    Cause Missing forecast data for material when system tries to calculate target stock.
    Effect System cannot determine target stock, leading to error WT131.
    Solution Maintain forecast data for the material and period; check planning horizon and config.
    Related Tcodes /SAPAPO/SDP94, MD61, LT24
    Notes Verify integration between forecasting and WM replenishment processes.

    If you provide more details about your system setup (e.g., SAP ECC or S/4HANA, use of APO, etc.), I can tailor the solution further.

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