Basically what I'm seeing is that on odd occasions a load test (say with 30 VUs) fails to stop, or even abort. I have to use "Session/Stop". What I've realised is that although most VUs do stop correctly, others remain in the "Running" state (apparently forever). I suspect this may be due to an issue with the System Under Test, but what puzzles me is that OLT itself doesn't time-out!
I've checked my options in OLT and I still have the defaults: