Some people have problems reading EDC17 with OTP protected. For example Corsa D EDC17C18, OTP protected and KT200 ecu programmer not write other file.
EDC17 OTP ERROR solution:- think due to try to write FULL flash not partial. Please read password before writing file for test.
Must read password first to write full flash.
If you have other editor that you can do compare on Original and Modified file to see if any noticeable differences i.e. address location shift, if want send KT200 technician both files as would like to address this problem.