How To Fix 3L420 - Discount cannot be negative

SAP Error Message - Details

• Message type: E = Error

• Message class: 3L - HR: Messages for Mexico

• Message number: 420

• Message text: Discount cannot be negative

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 3L420 - Discount cannot be negative ?

  The SAP error message 3L420: Discount cannot be negative typically occurs in the context of sales and distribution (SD) or pricing procedures when a discount value is being processed that is less than zero. This error is designed to prevent negative discounts, which would not make sense in a standard pricing scenario.
  Cause:
  
  Incorrect Manual Entry: A user may have manually entered a negative discount value in the pricing conditions.
  Pricing Condition Records: There may be condition records set up in the system that incorrectly specify negative discounts.
  Custom Logic: If there are custom enhancements or user exits in the pricing logic, they might be incorrectly calculating discounts.
  Data Migration Issues: If data was migrated from another system, it might have included negative discount values that are not valid in SAP.
  
  Solution:
  
  
  Check Pricing Conditions:
  
  Navigate to the pricing condition records (transaction code: VK11 for creating or VK12 for changing).
  Review the condition types related to discounts and ensure that no negative values are set.
  
  
  
  Review Sales Order/Quotation:
  
  Check the sales order or quotation where the error occurred. Look for any manual entries or calculations that might have resulted in a negative discount.
  Ensure that the discount fields are populated correctly.
  
  
  
  Custom Logic Review:
  
  If there are custom enhancements or user exits, review the code to ensure that it does not allow for negative discount calculations.
  
  
  
  Data Validation:
  
  If the error is due to data migration, validate the data to ensure that all discount values are appropriate and correct.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or consult with your SAP support team for any specific configurations or settings that might be causing this issue.
  
  
  
  Testing:
  
  After making corrections, test the process again to ensure that the error does not reoccur.
  
  
  
  Related Information:
  
  Condition Types: Familiarize yourself with the condition types used in your pricing procedure, especially those related to discounts (e.g., K007 for customer discounts).
  Pricing Procedure: Understand the pricing procedure assigned to your sales document type, as it dictates how discounts and other pricing elements are processed.
  SAP Notes: Check for any relevant SAP Notes that might address this error or provide additional guidance.
  
  If the issue persists after following these steps, it may be beneficial to engage with your SAP support team or consult SAP community forums for further assistance.