I'm writing some IVR in Lua  and trying to execute some code while the main program continues execution. 

   

I've tried 

  

    ...

    -- aws is AWS Command Line Interface

    io.popen("aws s3 cp " ..  s3_src .. " ".. s3_dst)

    os.execute("aws s3 cp " ..  s3_src .. " ".. s3_dst)

    ... -- program execution continues

    

Even tried  passing it off to a shell script(`s3_upload`)

    os.execute("s3_upload " ..  s3_src .." " .. s3_dst)

    io.popen("s3_upload " ..  s3_src .. " ".. s3_dst)

I've tried 

 session:execute("bgsystem","s3_upload " ..  s3_src .. " ".. s3_dst )

If i use the Lua Interactive shell to run these commands independently, it works.

would appreciate any assistance.