How to use a coupon in different condition ?

-- HikaShop version -- : 2.4.0
-- HikaSerial version -- : 1.9.2
-- Joomla version -- : 3.1
-- PHP version -- : 5.5
-- Browser(s) name and version -- : firefox
-- Error-message(debug-mod must be tuned on) -- : How to use coupon in different conditions?

I gave customers a coupon when he bought products > 6 pieces, but i want he can use the coupon next time no matter how much pieces he buy the next time. But what the coupon generator generated a coupon with the same amount set in the original template ( > 6 pieces), so the customer can not use the coupon when he buy 1 piece next time. How to resolve this ? Because it is quite practical problem. We usually did not restrict the customers about the amount they buy to use a coupon which we gave them previously.

Thanks

It is difficult to describe the problem with screenshots.
It can be understood very easily: the coupon with serial number created by Hikaserial is a complete same copy of the coupon template created by Hikashop (the gift certificate function). If the coupon template has a restriction of minimal order number of orders greater than 6 pieces, then the coupon created by Hikaserial also have such restriction. But that is not what i wanted. Because i want coupon user can use the coupon without any restriction next time ( this is also the usual trade condition we need).

i want the customers to have bought more products before they can get the coupons. But i want they can use this coupon for next trade without such restriction ( even buy 1 piece of product can use the coupons from previous 6-pieces trade)

1. So how to restrict the gift certificate to orders with minimum number of products to greater than, for example, 6 or 8 ? (without setting the restriction in the initial coupon template ?)
2. If there is no function to achieve that in Hikaserial, then please tell me how to make the minimum number of products to fix to 0 or 1 when creating coupon with specific serial numbers from Hikaserial ( if the number in coupon template is , for example , 6 or 8 )? please see the attached files. I tried to hack the core file coupongen.php, but i can not find the code which created the new coupons. Please tell me how to do that manually.
3. I need this function badly because this is the very common way we do our business.
Thanks

Actually, my concept is not so different from your original design for coupons. You just used "products" to restrict the coupons, and now i want to use "orders" to restrict the coupons. I think this is a very frequent requirement during daily trading in our countries. Most often, people buy many products at one time. So, restricting the coupons with order is more practical than binding the pack to just one product. Please consider what i said more profoundly. This will be a must-have function for any professional shopping cart system.
I found another plug-in named :"serial by order". This is very close to what i said. Actually this plug-in made it possible that a coupon will be sent to the customer when an order is created without binding any packs to any products. But unfortunately, there are no any fields for restriction such as minimal product numbers, or minimal order price , etc.
So if you are sure that you can not reach what i wanted "order-restricted" coupons, please tell me how to modify the "serial by order" plug-in to let me can make some restriction to orders. I think that is the most simple thing you can do for me.

Please evaluate my demand more meticulously and harder because this is the first time i shift to Hikashop related products and rumor said that it is perfect ......

I want the following functions:
1. give a customer a NT$300 personal coupon (only for him with one serial to his email) if he bought products > 6 pieces.
2. give a customer a NT$500 personal coupon (only for him with one serial to his email) if he bought products > 8 pieces.
etc.....
no matter what kind of products he bought. coupons will be given according to the total pieces in one order.
quite simple concept, right ?
But i found no way to do that in your software.

You are right , I meant "bought more than 6 products", "more than 8 products"
please help me

thanks

why there are so many misunderstanding between us .... for such a simple requirement ... sigh ...

You seemed to still miss my points.....
My point is to restrict the way people "get" their coupons, not how they can "use" their coupons .....
So, who should receive a coupon should be determined by how they ordered .....

The more they bought, the more valuable coupons they will get ( for the next time they order, they can use these coupons).
I will not give coupons to people buy 1 product, but i will give coupons to people who bought 6 products .....
is it clear ?

forgive my urgency...... i am really anxious to be blocked by this bottleneck for the whole project of my shopping cart .....

wish to hear from you soon ... (without any misunderstanding ....)

Thanks
But i can not input anything after install the plug-in you provided. (as attached file)
No textfields to input.

anything wrong ?

can you also provide me the minumum and maximum total order prices as restriction as the minimum or maximum quantity ? that will be a very practical need for me.

Thanks

By the way, should i remove the old plug-in before installing this one ? because i dont see the serialperorder_configuration.php in the new plug-in zip file. Don't need that file anymore ?

It works like a charm now, Jerome. Very much appreciated for your patient replies and marvelous resolution. You are most responsible software maintainer I have ever seen in the Joomla society. Wish your business will thrive in the near future.