How To Fix WRF_AT107 - Order-optimized quantity of DC was to be < 0; it will be set to 0

SAP Error Message - Details

• Message type: E = Error

• Message class: WRF_AT - Messages for Allocation Table RTFASH

• Message number: 107

• Message text: Order-optimized quantity of DC was to be < 0; it will be set to 0

What causes this issue?

The order-optimized quantity of the distribution center &V2& in the
allocation table &V1& was to be less than zero (&V4&) during
synchronization with the purchase order &V3&. However, this is not
permitted.

System Response

The system set the order-optimized quantity of the distribution center
&V2& in the allocation table &V1& to zero. The system was unable to
fully synchronize the quantity change in the purchase order in the
allocation table.

How to fix this error?

Check the allocation table &V1& and adjust the quantities manually
(transaction WA02), so that the allocation table is complete.

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 WRF_AT107 - Order-optimized quantity of DC was to be < 0; it will be set to 0 ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WRF_AT107: Order-optimized quantity of DC was to be < 0; it will be set to 0
  
  Cause:
  This message occurs during the planning or order optimization process in SAP, particularly in the context of Demand Planning, Supply Network Planning (SNP), or Advanced Planning and Optimization (APO). The system calculates an order-optimized quantity for a Distribution Center (DC) or location, and the result is a negative quantity, which is logically invalid because order quantities cannot be negative.
  The negative quantity can arise due to:
  
  Incorrect or inconsistent master data (e.g., stock levels, safety stock, or demand forecasts).
  Planning heuristics or optimization algorithms that, due to constraints or parameters, calculate a negative replenishment quantity.
  Incorrect or missing parameters in the planning run or order optimization settings.
  Data inconsistencies in the supply chain model, such as incorrect lead times, lot sizes, or minimum order quantities.
  Demand or supply imbalances causing the system to "overshoot" in calculations.
  
  
  What the Message Means:
  The system detects that the calculated order-optimized quantity is less than zero, which is not feasible. Therefore, it automatically sets the order quantity to zero to avoid creating invalid orders.
  This message is a warning rather than an error that stops processing. It informs the planner or user that the system adjusted the quantity to zero to maintain data integrity.
  
  Solution / How to Fix:
  
  
  Check Master Data:
  
  Verify stock levels, safety stock, reorder points, and minimum order quantities for the DC.
  Ensure that lead times and lot sizes are correctly maintained.
  Check demand forecasts and actual demand data for inconsistencies.
  
  
  
  Review Planning Parameters:
  
  Examine the planning heuristics or optimization parameters used in the planning run.
  Adjust parameters such as safety stock, lot sizing, or planning horizons to avoid negative calculations.
  
  
  
  Analyze Supply and Demand Balances:
  
  Look for imbalances in supply and demand that might cause the system to calculate negative replenishment.
  Adjust demand forecasts or supply constraints accordingly.
  
  
  
  Check for Data Inconsistencies:
  
  Run consistency checks on the supply chain model.
  Use transaction codes or tools specific to your SAP module (e.g., /SAPAPO/SDP94 for SNP planning) to analyze planning results.
  
  
  
  Review Custom Enhancements or User Exits:
  
  If custom logic is implemented in planning or order optimization, verify that it does not produce negative quantities.
  
  
  
  Monitor and Document:
  
  If the message appears frequently, document the affected products or DCs and analyze trends.
  Consider adjusting planning strategies or safety stock policies.
  
  
  
  
  Related Information:
  
  Module Context: This message is common in SAP APO SNP or SAP IBP when performing order optimization or heuristics.
  Transaction Codes: Planning transactions like /SAPAPO/SDP94, /SAPAPO/SDP91, or /SAPAPO/SDP96.
  SAP Notes: Check SAP OSS Notes for any known issues related to WRF_AT107.
  Impact: Usually a warning; the system prevents invalid order creation by setting quantity to zero.
  Further Analysis: Use planning logs and detailed planning results to trace the root cause.
  
  
  Summary:
  
  Cause: Negative order quantity calculated due to data or parameter issues.
  Effect: System sets order quantity to zero to avoid invalid orders.
  Solution: Check and correct master data, planning parameters, and supply-demand balance.
  
  
  If you provide more context (e.g., module, transaction, scenario), I can help tailor the solution further.