111286: Ontario is not a valid state for the specified shipment.

We have installed UPS module for shipping and when we go to Step 1 of the checkout process we are getting this message.

"United Parcel Service (XML)
111286: Ontario is not a valid state for the specified shipment.
If you prefer to use ups as your shipping method, please contact"

When we do a shipping quote, everything works okay. I checked the UPS Module and it is active, green light is on. We are currently using Zencart v1.3.9b

Any help would be great!

Thanks.

Not sure if it would apply for you, but around line 261 I customized the code for an obscure issue with:

                if (isset($this->servicesTimeintransit[$type]) && isset($this->servicesTimeintransit[$type]["date"])) {
                    $eta_array = explode("-", $this->servicesTimeintransit[$type]["date"]);
                    $months = array (" ", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
                    $eta_arrival_date = $months[(int)$eta_array[1]]." ".$eta_array[2].", ".$eta_array[0];
                    $_type .= ", ETA: ".$eta_arrival_date;
                }

I do not have the original code off hand but you should see where the IF is added ...

Which file would I find that code in?

I would look in the shipping module where you are having the problem in:
/includes/modules/shipping/upsxml.php

I am having the same problem.

"111286: ONT is not a valid state for the specified shipment."

The above proposal did not help my situation.