Comments by O'Doudarragh (Top 1 by date)

Thanks for hints. It turned out, it was entirely my fault: I wasn't properly enumerating pins on filters and always made one iteration too much. What helped to pinpoint the issue was printing out all properties of all filters and pins involved in connecting the pins - it immediately became obvious that I was actually trying to connect wrong ones. Somehow I've managed to miss that even though I've gone step by step through the routines with debugger several times.