On Tue, Mar 26, 2013 at 8:16 AM, Mousumi Basu <mousumi251 at gmail.com> wrote: > File"C:\dtls\Dtls-0.1.0.sdist_with_openssl.win32\Dtls-0.1.0\dtls\"openssl.py", > line 74 in <module> You didn't install the package. Run "python setup.py install". This will install it to Lib\site-packages\Dtls and copy the pre-built DLLs into the package directory.