slim partition command gives Traceback error

[mufthmu]

I ran the command :
$ slim partition AlertApp-1.0.0.tar.gz

and it gave me this error:

slim partition: Extracting source from "AlertApp-1.0.0.tar.gz"...
slim partition: Adding AlertApp:1.0.0 to installation graph...
Traceback (most recent call last):
File "/Users/muhammad/Virtualenvs/slim/bin/slim", line 8, in
sys.exit(main())
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/slim/main.py", line 26, in main
args.invoke_command(args)
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/slim/partition.py", line 64, in main
), args.target_os)
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/slim/app/server_class.py", line 377, in add
server_class, dependency_graph, target_os, self._validate, is_external
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/slim/app/_installation.py", line 601, in from_dependency_graph
installation_graph._resolve()
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/slim/app/_installation.py", line 858, in _resolve
installation.resolve_dependents(self)
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/slim/app/_installation.py", line 301, in resolve_dependents
self._version_range = semantic_version.Spec(*version_range)
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/semantic_version/base.py", line 1196, in __init_
super(LegacySpec, self).init(expression)
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/semantic_version/base.py", line 618, in init
self.clause = self._parse_to_clause(expression)
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/semantic_version/base.py", line 1014, in _parse_to_clause
return cls.Parser.parse(expression)
File "/Users/muhammad/Virtualenvs/slim/lib/python2.7/site-packages/semantic_version/base.py", line 1034, in parse
raise ValueError("Invalid simple block %r" % block)
ValueError: Invalid simple block ''

Does anybody have this issue?
Thanks!