[SOLVED] - Stop email when changing order status from missing orders

Hi there!
I had a troubles with the subject line, but hope you will understand me now...
What i want to achieve is when i change the order status from missing to any other status (or for example from order_status_id=0 to order_status_id=16) TO STOP SENDING confirmation email to client.
Is it possible and how?
OC version is 2.3.0.2.
I tried to change this line on catalog/model/checkout/order.php to this But nothing happens.
Also trued this on the same file, before this line: added this: Again nothing helps. When i change order status from missing order to order status 16 - the client is recieving confirmation email. How to prevent this?
Thank you!

That is because the addOrderHistory is launched with JSON Encoding. If you don't see any differences after modifying a file, you are either experiencing cache or time zone issues. Also ensure to edit your files with UTF-8 without BOM format prior to uploads.

straightlight wrote: ↑

Thu Apr 23, 2020 7:56 pm

you are either experiencing cache or time zone issues. Also ensure to edit your files with UTF-8 without BOM format prior to uploads.

Im clearing all the cache but again nothing changes...

Any extensions installed from your OC admin - > extensions - > modifications page?

straightlight wrote: ↑

Fri Apr 24, 2020 5:03 am

Any extensions installed from your OC admin - > extensions - > modifications page?

I didnt understand....

mupcku wrote: ↑

Fri Apr 24, 2020 9:04 pm

straightlight wrote: ↑

Fri Apr 24, 2020 5:03 am

Any extensions installed from your OC admin - > extensions - > modifications page?

I didnt understand....

Any extensions installed on your store?

straightlight wrote: ↑

Fri Apr 24, 2020 9:14 pm

Any extensions installed on your store?

I found the solution...
I want, when changing an order status from missing to status with id 16, to disable the standart order emails.
So i changed this line: To this: