Traceback (most recent call last):
  File "/usr/bin/rubber", line 9, in <module>
    sys.exit(Main()(sys.argv[1:]))
  File "/usr/share/rubber/rubber/cmdline.py", line 296, in __call__
    return self.main(cmdline)
  File "/usr/share/rubber/rubber/cmdline.py", line 252, in main
    ret = env.main.make(1)
  File "/usr/share/rubber/rubber/__init__.py", line 235, in make
    ret = self.force_run()
  File "/usr/share/rubber/rubber/rules/latex/__init__.py", line 1204, in force_run
    return self.run(1)
  File "/usr/share/rubber/rubber/rules/latex/__init__.py", line 1225, in run
    while self.recompile_needed():
  File "/usr/share/rubber/rubber/rules/latex/__init__.py", line 1271, in recompile_needed
    if self.deps_modified(getmtime(self.prods[0])):
  File "/usr/lib/python2.6/genericpath.py", line 54, in getmtime
    return os.stat(filename).st_mtime
OSError: [Errno 2] No such file or directory: 'document.pdf'