TraitError in debug mode

While trying to print variable values in python prompt while debugging, I am getting this error in pycharm community edition 5.0.3. 

TraitError: Unexpected error in TraitType: default value not set properly

Thanks,

Joe

Traceback

Traceback (most recent call last):
File "/home/joe/pycharm-community-5.0.3/helpers/pydev/pydevd_comm.py", line 1323, in doIt
result = pydevconsole.consoleExec(self.thread_id, self.frame_id, self.expression)
File "/home/joe/pycharm-community-5.0.3/helpers/pydev/pydevconsole.py", line 442, in consoleExec
return exec_code(CodeFragment(expression), updated_globals, frame.f_locals)
File "/home/joe/pycharm-community-5.0.3/helpers/pydev/pydevconsole.py", line 359, in exec_code
interpreterInterface = get_interpreter()
File "/home/joe/pycharm-community-5.0.3/helpers/pydev/pydevconsole.py", line 341, in get_interpreter
interpreterInterface = InterpreterInterface(None, None, threading.currentThread())
File "/home/joe/pycharm-community-5.0.3/helpers/pydev/pydev_ipython_console.py", line 26, in __init__
self.interpreter = get_pydev_frontend(host, client_port)
File "/home/joe/pycharm-community-5.0.3/helpers/pydev/pydev_ipython_console_011.py", line 472, in get_pydev_frontend
_PyDevFrontEndContainer._instance = _PyDevFrontEnd()
File "/home/joe/pycharm-community-5.0.3/helpers/pydev/pydev_ipython_console_011.py", line 303, in __init__
self.ipython = PyDevTerminalInteractiveShell.instance()
File "/usr/local/lib/python2.7/dist-packages/IPython/config/configurable.py", line 337, in instance
inst = cls(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/IPython/core/interactiveshell.py", line 512, in __init__
self.init_readline()
File "/usr/local/lib/python2.7/dist-packages/IPython/core/interactiveshell.py", line 1911, in init_readline
if self.readline_use:
File "/usr/local/lib/python2.7/dist-packages/traitlets/traitlets.py", line 310, in __get__
raise TraitError('Unexpected error in TraitType: '
TraitError: Unexpected error in TraitType: default value not set properly