On Friday 13 March 2009 14:52:19 RAAD B wrote: > These are the contents of the generated file. It looks like you appended the bitcode to an existing file. Did you use >> rather than >. Or are you on (horrors!) windows? Anyway, you can always do this: opt -load ..../Decorator.so -dec prog.bc -o new_prog.bc Ciao, Duncan.