Are you processing a Transfer Order Shipment (STK-PLT transaction)? This is a reported bug with an assigned SCR.
From: vantage@yahoogroups.com [mailto:vantage@yahoogroups.com] On Behalf Of Bill Jackson
Sent: Sunday, October 13, 2013 4:24 PM
To: vantage@yahoogroups.com
Subject: [Vantage] Vantage 6.10.541: Negative Inventory
In Part Class Maintenance, the Class is set to 'Negative Quantity Action' = Stop.
But some inventory is still allowed to go 'negative' ?