[Discuss-gnuradio] how to stop a flowgraph

[Mostafa Alizadeh]

Hi all, 

I have the following flowgraph: 

I want to interrupt the whole flowgraph to back to the main function (C++). I used to return -1 or WORK_DONE in the work function of the sink block but it doesn't work. What is the solution? 

Thanks in advance, 

Mostafa