Thank you harry for that valuable suggestion. I have made the migrations, still I am having an unhandled exception. I am adding the error log below
2014-02-26 12:26:34,840 :Traceback (most recent call last):
2014-02-26 12:26:34,840 : File "/usr/local/lib/python3.3/dist-packages/django/core/handlers/base.py", line 101, in get_response
2014-02-26 12:26:34,841 : resolver_match = resolver.resolve(request.path_info)
2014-02-26 12:26:34,841 : File "/usr/local/lib/python3.3/dist-packages/django/core/urlresolvers.py", line 318, in resolve
2014-02-26 12:26:34,841 : for pattern in self.url_patterns:
2014-02-26 12:26:34,841 : File "/usr/local/lib/python3.3/dist-packages/django/core/urlresolvers.py", line 346, in url_patterns
2014-02-26 12:26:34,842 : patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
2014-02-26 12:26:34,842 : File "/usr/local/lib/python3.3/dist-packages/django/core/urlresolvers.py", line 341, in urlconf_module
2014-02-26 12:26:34,843 : self._urlconf_module = import_module(self.urlconf_name)
2014-02-26 12:26:34,843 : File "/usr/lib/python3.3/importlib/__init__.py", line 90, in import_module
2014-02-26 12:26:34,843 : return _bootstrap._gcd_import(name[level:], package, level)
2014-02-26 12:26:34,843 : File "<frozen importlib._bootstrap>", line 1584, in _gcd_import
2014-02-26 12:26:34,844 : File "<frozen importlib._bootstrap>", line 1565, in _find_and_load
2014-02-26 12:26:34,844 : File "<frozen importlib._bootstrap>", line 1532, in _find_and_load_unlocked
2014-02-26 12:26:34,845 : File "<frozen importlib._bootstrap>", line 584, in _check_name_wrapper
2014-02-26 12:26:34,845 : File "<frozen importlib._bootstrap>", line 1022, in load_module
2014-02-26 12:26:34,845 : File "<frozen importlib._bootstrap>", line 1003, in load_module
2014-02-26 12:26:34,846 : File "<frozen importlib._bootstrap>", line 560, in module_for_loader_wrapper
2014-02-26 12:26:34,846 : File "<frozen importlib._bootstrap>", line 868, in _load_module
2014-02-26 12:26:34,847 : File "<frozen importlib._bootstrap>", line 313, in _call_with_frames_removed
2014-02-26 12:26:34,847 : File "/home/vinya/dtchat/dtchat/urls.py", line 4, in <module>
2014-02-26 12:26:34,848 : admin.autodiscover()
2014-02-26 12:26:34,848 : File "/usr/local/lib/python3.3/dist-packages/django/contrib/admin/__init__.py", line 25, in autodiscover
2014-02-26 12:26:34,849 : mod = import_module(app)
2014-02-26 12:26:34,849 : File "/usr/lib/python3.3/importlib/__init__.py", line 90, in import_module
2014-02-26 12:26:34,849 : return _bootstrap._gcd_import(name[level:], package, level)
2014-02-26 12:26:34,849 : File "<frozen importlib._bootstrap>", line 1584, in _gcd_import
2014-02-26 12:26:34,850 : File "<frozen importlib._bootstrap>", line 1565, in _find_and_load
2014-02-26 12:26:34,850 : File "<frozen importlib._bootstrap>", line 1529, in _find_and_load_unlocked
2014-02-26 12:26:34,851 :ImportError: No module named 'djangoChat'
2014-02-26 12:26:34,851 :
2014-02-26 12:26:34,851 :During handling of the above exception, another exception occurred:
2014-02-26 12:26:34,851 :
2014-02-26 12:26:34,851 :Traceback (most recent call last):
2014-02-26 12:26:34,851 : File "/bin/user_wsgi_wrapper.py", line 67, in __call__
2014-02-26 12:26:34,852 : self.error_log_file.logger.exception("Error running WSGI application")
2014-02-26 12:26:34,852 : File "/usr/lib/python3.3/logging/__init__.py", line 1269, in exception
2014-02-26 12:26:34,853 : self.error(msg, *args, **kwargs)
2014-02-26 12:26:34,853 : File "/usr/lib/python3.3/logging/__init__.py", line 1262, in error
2014-02-26 12:26:34,854 : self._log(ERROR, msg, args, **kwargs)
2014-02-26 12:26:34,855 : File "/usr/lib/python3.3/logging/__init__.py", line 1368, in _log
2014-02-26 12:26:34,856 : self.handle(record)
2014-02-26 12:26:34,856 : File "/usr/lib/python3.3/logging/__init__.py", line 1377, in handle
2014-02-26 12:26:34,857 : if (not self.disabled) and self.filter(record):
2014-02-26 12:26:34,857 : File "/usr/lib/python3.3/logging/__init__.py", line 687, in filter
2014-02-26 12:26:34,858 : for f in self.filters:
2014-02-26 12:26:34,858 : File "/bin/user_wsgi_wrapper.py", line 59, in __call__
2014-02-26 12:26:34,858 : app_iterator = self.app(environ, start_response)
2014-02-26 12:26:34,859 : File "/usr/local/lib/python3.3/dist-packages/django/core/handlers/wsgi.py", line 206, in __call__
2014-02-26 12:26:34,859 : response = self.get_response(request)
2014-02-26 12:26:34,859 : File "/usr/local/lib/python3.3/dist-packages/django/core/handlers/base.py", line 196, in get_response
2014-02-26 12:26:34,860 : response = self.handle_uncaught_exception(request, resolver, sys.exc_info())
2014-02-26 12:26:34,860 : File "/usr/local/lib/python3.3/dist-packages/django/core/handlers/base.py", line 231, in handle_uncaught_exception
2014-02-26 12:26:34,860 : return debug.technical_500_response(request, *exc_info)
2014-02-26 12:26:34,861 : File "/usr/local/lib/python3.3/dist-packages/django/views/debug.py", line 69, in technical_500_response
2014-02-26 12:26:34,861 : html = reporter.get_traceback_html()
2014-02-26 12:26:34,861 : File "/usr/local/lib/python3.3/dist-packages/django/views/debug.py", line 323, in get_traceback_html
2014-02-26 12:26:34,862 : c = Context(self.get_traceback_data())
2014-02-26 12:26:34,862 : File "/usr/local/lib/python3.3/dist-packages/django/views/debug.py", line 281, in get_traceback_data
2014-02-26 12:26:34,862 : frames = self.get_traceback_frames()
2014-02-26 12:26:34,863 : File "/usr/local/lib/python3.3/dist-packages/django/views/debug.py", line 428, in get_traceback_frames
2014-02-26 12:26:34,863 : pre_context_lineno, pre_context, context_line, post_context = self._get_lines_from_file(filename, lineno, 7, loader, module_name)
2014-02-26 12:26:34,863 : File "/usr/local/lib/python3.3/dist-packages/django/views/debug.py", line 379, in _get_lines_from_file
2014-02-26 12:26:34,864 : source = loader.get_source(module_name)
2014-02-26 12:26:34,864 : File "<frozen importlib._bootstrap>", line 605, in _requires_frozen_wrapper
2014-02-26 12:26:34,865 :ImportError: importlib._bootstrap is not a frozen module
What are the possible reasons for this exception??? Good wishes to all.....