Traceback (most recent call last):
  File "/usr/share/hplip/ui4/filetable.py", line 273, in AddFileButton_clicked
    self.addFileList(files)
  File "/usr/share/hplip/ui4/filetable.py", line 281, in addFileList
    self.addFileFromUI(f)
  File "/usr/share/hplip/ui4/filetable.py", line 288, in addFileFromUI
    if os.path.exists(f) and os.access(f, os.R_OK):
  File "/usr/lib/python2.7/genericpath.py", line 18, in exists
    os.stat(path)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xfc' in position 19: ordinal not in range(128)