Traceback (most recent call last):
  File "NARA_uploader_JPG.py", line 571, in <module>
    main(sys.argv[1:])
  File "NARA_uploader_JPG.py", line 512, in main
    filesToUpload = createDerivatives(sourcefilename)
  File "NARA_uploader_JPG.py", line 368, in createDerivatives
    makeDerivative('.jpg')
  File "NARA_uploader_JPG.py", line 352, in makeDerivative
    derivativeName = makeDerivativeName()
  File "NARA_uploader_JPG.py", line 349, in makeDerivativeName
    return os.path.join(derivativeDirectory, srcName + convertExt)
NameError: global name 'derivativeDirectory' is not defined