Cannot delete wrongly created orders

Hi
OC 3020 , when i try to delete an order i get the following error:
[Exception... "<no message>" nsresult: "0x805e0006 (<unknown>)" location: "JS frame :: https://www.========.co.uk/=====/admin/view/javascript/jquery/jquery-2.1.1.min.js :: .send :: line 4" data: no]

[Exception... "<no message>" nsresult: "0x805e0006 (<unknown>)" location: "JS frame :: https://www.=====.co.uk/=====/admin/view/javascript/jquery/jquery-2.1.1.min.js :: .send :: line 4" data: no]

undefined

Can someone help please?

Regards
Steve

What is the route location of the URL when you try to delete an order?