How To Fix LF168 - Negative values not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: LF - Mobile Computing in Warehouse Logistics

• Message number: 168

• Message text: Negative values not allowed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message LF168 - Negative values not allowed ?

  The SAP error message LF168 "Negative values not allowed" typically occurs in the context of inventory management or logistics when a transaction attempts to process a negative quantity for a material or stock item. This can happen in various scenarios, such as during goods movements, stock transfers, or inventory adjustments.
  Cause:
  
  Negative Stock Configuration: The system is configured to disallow negative stock levels for certain materials. This is often a business rule to prevent stock from going below zero.
  Incorrect Data Entry: A user may have inadvertently entered a negative quantity during a transaction.
  Stock Reconciliation Issues: Discrepancies in stock levels due to previous transactions or errors can lead to attempts to adjust stock negatively.
  Material Master Settings: The material master record may have settings that prevent negative stock, such as specific valuation types or stock types.
  
  Solution:
  
  Review Transaction Data: Check the transaction that triggered the error. Ensure that the quantities entered are correct and do not include negative values.
  Check Material Master Settings: Review the material master record for the affected item. Look for settings related to stock management and ensure that negative stock is allowed if that is the desired behavior.
  Adjust Stock Levels: If the stock levels are incorrect, perform a stock adjustment to correct the inventory levels before attempting the transaction again.
  Consult Configuration: If negative stock is required for certain materials, consult with your SAP configuration team to adjust the settings in the system to allow negative stock for specific materials or scenarios.
  User Training: Ensure that users are trained on proper data entry practices to avoid negative quantities in transactions.
  
  Related Information:
  
  Transaction Codes: Common transaction codes where this error might occur include MIGO (Goods Movement), MB1A (Goods Withdrawal), and MB1B (Transfer Posting).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Review SAP documentation on inventory management and stock handling to understand the implications of negative stock and how to manage it effectively.
  
  If the issue persists after following these steps, it may be beneficial to engage with your SAP support team or consult SAP's help resources for further assistance.