How To Fix WS399 - Inconsistent data: either net value or net price is allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 399

• Message text: Inconsistent data: either net value or net price is allowed

Self-Explanatory Message

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• What is the cause and solution for SAP error message WS399 - Inconsistent data: either net value or net price is allowed ?

  SAP Error Message:
  
  WS399 - Inconsistent data: either net value or net price is allowed
  
  Cause:
  This error occurs when both Net Value and Net Price fields are entered simultaneously in a sales document item, which is not allowed. SAP requires that either the Net Price or the Net Value be entered, but not both at the same time, to avoid inconsistencies in pricing calculations.
  
  Net Price: Price per unit of the material.
  Net Value: Total value for the item (Net Price × Quantity).
  
  If both are entered, SAP cannot determine which one to use for pricing and billing calculations, hence the inconsistency.
  
  When does it occur?
  
  During sales order creation or change (VA01/VA02).
  When manually entering or updating item pricing data.
  When copying documents or using custom programs that fill both fields.
  
  
  Solution:
  
  
  Check the item pricing data:
  
  Ensure that only one of the two fields is filled:
  
  Either enter the Net Price (price per unit) and let SAP calculate the Net Value.
  Or enter the Net Value (total amount) and leave the Net Price blank.
  
  
  
  
  
  Adjust the input method:
  
  If you want to enter a total amount, leave the price field blank.
  If you want to enter a unit price, leave the total value blank.
  
  
  
  Review custom enhancements or user exits:
  
  If this error occurs due to custom code or user exits, check that the logic does not fill both fields simultaneously.
  
  
  
  Check pricing procedure and condition records:
  
  Sometimes, incorrect pricing procedure setup or condition records can cause both fields to be populated.
  Verify pricing conditions and procedures to ensure they are consistent.
  
  
  
  
  Additional Information:
  
  This error is related to the pricing and billing process in SD (Sales and Distribution).
  The system expects a consistent pricing input to calculate taxes, discounts, and totals correctly.
  The error message is triggered by the standard SAP validation logic in sales document processing.
  
  
  Summary:
  
  
  
  Aspect
  Description
  
  
  
  
  Error
  WS399 - Inconsistent data: either net value or net price is allowed
  
  
  Cause
  Both Net Price and Net Value entered simultaneously
  
  
  Solution
  Enter only one: either Net Price or Net Value, not both
  
  
  Related Module
  SAP SD (Sales and Distribution)
  
  
  Transaction
  VA01, VA02 (Sales Order Create/Change)
  
  
  
  
  If you need further help, please provide the transaction and the exact steps leading to the error.