Authorize.net SIM does not send invoice number

[blackhawk]

I couldn't help to notice that there is no variable set for the invoice number to go to authorize's gateway web page. Does anyone know what variable that is?

My investigation led me to this page authorizenet_cc_sim.php

  tep_draw_hidden_field('x_invoice_num', "need the variable!");

thanks!
bh

[blackhawk]

fixed -

place the following code inside of the process_button() function...

                $next_inv = '';
                $inv_id = tep_db_query("select orders_id from " . TABLE_ORDERS . " order by orders_id DESC limit 1");
                $last_inv = tep_db_fetch_array($inv_id);
                $next_inv = $last_inv['orders_id']+1;

and add the following variable to the list below it....

tep_draw_hidden_field('x_invoice_num', $next_inv) .

Hope this helps someone out