How To Fix WS819 - Negative values are not allowed in the document at item level

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 819

• Message text: Negative values are not allowed in the document at item level

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS819 - Negative values are not allowed in the document at item level ?

  Certainly! Here's a detailed explanation regarding the SAP error message WS819: Negative values are not allowed in the document at item level:
  
  Error Message: WS819 - Negative values are not allowed in the document at item level
  
  Cause:
  This error occurs when you try to post or process a document in SAP that contains negative values at the item level, but the system or the specific business transaction does not allow negative amounts for those items.
  Common scenarios include:
  
  Posting a goods movement or invoice where the quantity or amount is negative, but the transaction type or configuration prohibits negative values.
  Certain document types or item categories are configured to only accept positive values.
  The business logic or validation rules in the system enforce that item-level values must be positive (e.g., in sales orders, billing documents, or material documents).
  Custom validations or user-exits/enhancements that restrict negative values.
  
  
  Where it typically occurs:
  
  Material documents (goods movements)
  Financial documents (invoices, credit memos)
  Sales and distribution documents
  Inventory postings
  
  
  Solution:
  
  
  Check the document data:
  
  Verify if any item has a negative quantity or amount.
  Confirm whether negative values are valid for this transaction type.
  
  
  
  Review configuration:
  
  Check the document type and item category settings to see if negative values are allowed.
  For example, in MM (Materials Management), certain movement types do not allow negative quantities.
  
  
  
  Adjust the data:
  
  If negative values are not allowed, correct the data to use positive values.
  If you intended to reverse or credit an item, use the appropriate reversal or credit document type.
  
  
  
  Use correct transaction/document type:
  
  For returns or cancellations, use the designated return or reversal document types that allow negative values.
  
  
  
  Check for custom validations:
  
  If custom code or user-exits are implemented, verify if they restrict negative values and adjust accordingly.
  
  
  
  Consult SAP Notes:
  
  Sometimes SAP releases notes or patches related to this error message.
  
  
  
  
  Related Information:
  
  Transaction codes: The error can appear in transactions like MIGO, MIRO, FB60, VF01, etc., depending on the module.
  SAP Modules: MM (Materials Management), SD (Sales and Distribution), FI (Financial Accounting).
  SAP Notes: Search for SAP Notes related to WS819 for specific fixes or explanations.
  Debugging: If the cause is unclear, debugging the program where the error is raised can help identify the exact validation.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WS819 - Negative values are not allowed in the document at item level
  
  
  Cause
  Negative item-level values entered where not permitted by configuration or business rules
  
  
  Solution
  Correct data to positive values, use appropriate document types, check config and validations
  
  
  Modules
  MM, SD, FI
  
  
  Common T-codes
  MIGO, MIRO, FB60, VF01
  
  
  
  
  If you provide the exact transaction or document type where you encountered this error, I can help with more specific guidance.