Reset Warn Levels Issue

I'm using the Pro Version 7.2.0 of the portal, and I'm trying to reset all my items to warn me when there are less than 3 in stock. When I go to reset warn levels, after the dialogue that asks if I want to continue, I click yes, and a runtime error comes up. Then the program quits on me. You said you want screenies. I tried to attach one, not sure I did it right. Is there a solution to this, or do I need to just change them all manually?
AttachmentSize
Image icon runtime error screenie.jpg51.7 KB

It doesnt work yet :P
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