FYI, Have just came across this myself.
Issue happens with different ISO's, Different USB Sticks & Different Systems.
Have tried multiple ISO's created on the one TechUSB, none load.
All of the ISO's tested were below 850mb each, most around the 300-400mb mark.
The USB drives are 8GB in size that were tested.
The error code I receive is CodeEnd:0x41C98
Cheers