Traceback (most recent call last):

 "d:\python27\lib\runpy.py", line 162, in _run_module_as_main
"__main__", fname, loader, pkg_name)

 "d:\python27\lib\runpy.py", line 72, in _run_code
exec code in run_globals

 "D:\Python27\Scripts\jupyter-nbconvert.exe\__main__.py", line 9, in <module>

 "d:\python27\lib\site-packages\jupyter_core\application.py", line 267, in launch_instance
return super(JupyterApp, cls).launch_instance(argv=argv, **kwargs)

 "d:\python27\lib\site-packages\traitlets\config\application.py", line 589, in launch_instance
app.start()

 "d:\python27\lib\site-packages\nbconvert\nbconvertapp.py", line 289, in start
self.convert_notebooks()

 "d:\python27\lib\site-packages\nbconvert\nbconvertapp.py", line 412, in convert_notebooks
self.convert_single_notebook(notebook_filename)

 "d:\python27\lib\site-packages\nbconvert\nbconvertapp.py", line 383, in convert_single_notebook
output, resources = self.export_single_notebook(notebook_filename, resources)

 "d:\python27\lib\site-packages\nbconvert\nbconvertapp.py", line 335, in export_single_notebook
output, resources = self.exporter.from_filename(notebook_filename, resources=resources)

 "d:\python27\lib\site-packages\nbconvert\exporters\exporter.py", line 165, in from_filename
return self.from_notebook_node(nbformat.read(f, as_version=4), resources=resources, **kw)

 "d:\python27\lib\site-packages\nbconvert\exporters\pdf.py", line 145, in from_notebook_node
rc = self.run_latex(tex_file)

 "d:\python27\lib\site-packages\nbconvert\exporters\pdf.py", line 108, in run_latex
self.latex_count, log_error)

 "d:\python27\lib\site-packages\nbconvert\exporters\pdf.py", line 88, in run_command
p = subprocess.Popen(command, stdout=stdout, stdin=null, shell=shell, env=env)

 "d:\python27\lib\subprocess.py", line 710, in __init__
errread, errwrite)

 "d:\python27\lib\subprocess.py", line 958, in _execute_child
startupinfo)TypeError: environment can only contain strings
Traceback (most recent call last):

 "/usr/local/lib/python2.6/dist-packages/celery/apps/beat.py", line 89, in start_scheduler
beat.start()

 "/usr/local/lib/python2.6/dist-packages/celery/beat.py", line 397, in start
humanize_seconds(self.scheduler.max_interval))

 "/usr/local/lib/python2.6/dist-packages/kombu/utils/**init**.py", line 229, in **get**
value = obj.**dict**[self.**name**] = self.**get(obj)

 "/usr/local/lib/python2.6/dist-packages/celery/beat.py", line 436, in scheduler
return self.get_scheduler()

 "/usr/local/lib/python2.6/dist-packages/celery/beat.py", line 431, in get_scheduler
lazy=lazy)

 "/usr/local/lib/python2.6/dist-packages/celery/utils/__init**.py", line 304, in instantiate
return get_cls_by_name(name)(_args, *_kwargs)

 "/usr/local/lib/python2.6/dist-packages/celery/beat.py", line 327, in **init**
Scheduler.**init**(self, _args, *_kwargs)

 "/usr/local/lib/python2.6/dist-packages/celery/beat.py", line 160, in **init**
self.setup_schedule()

 "/usr/local/lib/python2.6/dist-packages/celery/beat.py", line 358, in setup_schedule
for entry in entries.itervalues()))

 "/usr/local/lib/python2.6/dist-packages/celery/beat.py", line 358, in <genexpr>
for entry in entries.itervalues()))

 "/usr/local/lib/python2.6/dist-packages/celery/beat.py", line 122, in **repr**
reprcall(self.task, self.args, self.kwargs),

 "/usr/local/lib/python2.6/dist-packages/kombu/utils/**init**.py", line 262, in reprcall
return "%s(%s%s%s)" % (name, sep.join(map(_safe_repr, args)),TypeError: argument 2 to map() must support iteration