Hi everybody, My apologies. I have phrased my question, together with the example, rather unclearly, apparently. So I'll try again. :) My question, as intended, was: Generally speaking, how does one check whether Vue is a) running as supposed or b) looping / crashing? If a render takes much time, it's hard to see whether Vue is actually still rendering or already looping, simply because one scanline already needs many minutes to complete, i.e. until the display is updated. Hope it's clearer this way, without the example. ;) have fun, -Sascha.rb