PP Error 10486

I rarely get Paypal errors, they're usually associated with funds in my customer's accounts. But today I saw one come through for a customer, and I've never seen this one before.

*10486
This transaction couldn't be completed.
This transaction couldn't be completed. Please redirect your customer to
PayPal.

Zen Cart message: We were not able to process your order. Please try again,
select an alternate payment method, or contact the store owner for
assistance.*

I'm not sure what would be causing this. She's trying to use a debit card. The particular digital download product she's trying to order is one that other customers have purchased without trouble.

Any help would be great, thank you!

Ask her if she has a PayPal account - there are cookies left by PayPal on her PC that might force her to pay using PayPal account
Also, if the Debit Card is associated with the PayPal account this error might be generated

Ah, okay that makes sense. I've emailed her again. Haven't heard back from her yet from my first email, but I'm planning on sending her a Paypal invoice if she can't get it to work.

Thanks for the help!