COMP: Send exception results to std::cerr...and fixes unused var warning
COMP: Send exception results to std::cerr...and fixes unused var warning

cdeepakroy/TubeTK,matthieuheitz/TubeTK,aylward/ITKTubeTK,KitwareMedical/ITKTubeTK,KitwareMedical/TubeTK,LucasGandel/TubeTK,cdeepakroy/TubeTK,aylward/ITKTubeTK,sumedhasingla/TubeTK,KitwareMedical/ITKTubeTK,sumedhasingla/TubeTK,thewtex/TubeTK,aylward/ITKTubeTK,thewtex/TubeTK,matthieuheitz/TubeTK,matthieuheitz/TubeTK,thewtex/TubeTK,cdeepakroy/TubeTK,cdeepakroy/TubeTK,LucasGandel/TubeTK,KitwareMedical/ITKTubeTK,matthieuheitz/TubeTK,KitwareMedical/TubeTK,LucasGandel/TubeTK,LucasGandel/TubeTK,sumedhasingla/TubeTK,thewtex/TubeTK,KitwareMedical/ITKTubeTK,KitwareMedical/TubeTK,sumedhasingla/TubeTK,aylward/ITKTubeTK,KitwareMedical/TubeTK