Launch Task from script without context

Hello,

Firstly, a brief introduction to the problem:

When a CTI interaction (phone call or chat) ends, I am to invoke a task that forces the user to edit and close a case that is created automatically for that particular interaction. The problem is that at the time of this event, the user can be anywhere in the application - also on an applet without context. Any attempt to launch a task from script in that case, as is well known, produces an error.

I would therefore like to discuss the possibilities of a general solution of simulating context when launching a task from script, which resides particulary in a Business Service. I can sum up the things I already have tried, but failed: