Tax causes error "amount must be greater than zero

EDIT: I have fixed the tax problem referred to below but still have the problem with zero amount for the store. Please see 3rd post in this thread. Didn't want you to have to read a bunch of unnecessary stuff

-- HikaShop version -- : 2.3.5
-- HikaMarket version -- : 1.6.0
-- Joomla version -- : 3.4.0
-- PHP version -- : 5.4.31
-- Browser(s) name and version -- : Firefox 36.0 & Safari 6.1.6
-- Error-message(debug-mod must be tuned on) -- : "Invalid request parameter: amount must be greater than zero."
Also got "If the fractional amount is rounded for currency conversion, funds could be lost" for one test transaction but am not sure what was different about that one.

Taxes and Fees Options - Vendor Price with Tax: Yes

I need each vendor to receive the taxes paid for their sales but when Vendor Price with Tax is set to Yes, it causes an error because the system is including the main store email address with either a zero amount or even a negative amount if rounded. Each vendor needs to receive the sales tax rate x their total sales price, and the main store email shouldn't receive anything.

I sent superadmin & ftp login last night through a support form. Thanks!

    [actionType] => PAY
    [currencyCode] => USD
    [receiverList] => Array
        (
            [0] => Array
                (
                    [email] => xxxx-facilitator@xxxxx.com
                    [amount] => 0
                )

            [1] => Array
                (
                    [email] => xxxx@xxxxx.com
                    [amount] => 35
                )

            [2] => Array
                (
                    [email] => seller_1234132804_biz@xxxxx.com
                    [amount] => 85.5
                )

        )

sorry - didn't mean to make this post so edited it out

I believe I have the tax issue fixed (though I don't know what I did ).

Because we're using PayPal Adaptive, though, with no fees or commissions, I still get the "amount must be greater than zero" error. I found this post that says:

Jerome wrote: If you are using paypal adaptive, all recipients should have an amount so if you are not using fees, your recipient won't have any amount and paypal will refuse it.
The plugin is configured to always put your store as the primary recipient for paypal adaptive.
I will suggest you to use the "classical" mode in the paypal adaptive plugin and use the limitation of vendors.

Hi Jerome,
Thanks for the fast reply. I'm just going by what the PayPal documentation says but it would be great if you can update it. Hopefully their diagram & explanation is correct!

Thank you! I've made it to the PayPal sandbox login page w/out error; I'll let you know if I have any problems in further testing.

I appreciate your help!