I tried using

r = o.oPaymentObj.nAddPayment()

Instead of the nAddDeposit() method and that also gives me the same result.

In my test, it told me that the address fields were missing.  I set them and it worked.  Try adding these lines:

r = o.oPaymentObj.nSetValue("CardholderName$", "John Doe")
r = o.oPaymentObj.nSetValue("AVSAddressLine1$", "address line 1")
r = o.oPaymentObj.nSetValue("AVSCity$", "some city")
r = o.oPaymentObj.nSetValue("AVSState$", "WA")
r = o.oPaymentObj.nSetValue("AVSZipCode$", "98101")
r = o.oPaymentObj.nSetValue("AVSCountryCode$", "USA")

I've tried that and what's odd is that one time, I'll get a card to come in, then most times the cards do not come in. I've also tried adding the "save card" line after the address, and that doesn't work either.

Okay, this is odd. I have discovered that when NO ONE ELSE is in the system, credit cards import into my sales orders just fine.

When other people are logged into the system, credit cards DO NOT import into the sales orders.

The code is literally the same between tries.

I think the error message I got is a red herring and the actual cause is something else.

I had about 20 orders with credit cards and 1 imported just fine, the others failed. At this point, I'm at a loss of what to check. It seems mostly random, other than it works every so often.