so long not hearing you! Thank you for your feedback, I use blender -> iqm exporter directly. But the problem is code-side. Infact, if you use v5040, fte doesn't crash. Sad thing was that Spike completely ignored my bug report and now fte is carrying on this bug on newer releases.
Plus the bug is difficult to test, because it's involved project() function, which converts 3d space to 2d space so, if you simply make a traceline directly, for example, from player view, fte won't crash. Anyway in these months I'm so busy I can't update crafter and track fte bugs so it's all postponed to summer, which it's a shame because it was my intention to upload first release in late January