Yes, what you see is a good sign: it means that the script works as intended and does not crash when your request for the image fails
My guess is that the moving object is missing because your request to your bucket is processed very quickly but, instead of returning the zip file, it returns an error-like object (hence the non-display of your image upon running the trial)
In the meantime, if you don’t have too many images and the files are not too big, feel free to upload them to the PCIbex Farm (the Potsdam-experiments account currently only uses about 4.5MB out of the new 64MB limit)
Jeremy