I kept trying changing the values in c_trace, like ignore_me + models etc...
Kiwi Boy mentioned it, but I want to assure that you understand:
'trace' (as used in you code) is NOT the same as 'c_trace'. You have to change that. 'trace' is old syntax and it is unable to handle models as complex obstacles with polygon = on!
And, changing 'trace' to 'c_trace' means more than changing the word, look into the manual for this.
