Thanks Yibin for your reply. I am trying to use Spectre now but I have the following problem.
I am trying to simulate a design. All works well with "spectreS" simulator, but when it comes to "spectre" then I get an error.
Error found by spectre during circuit read-in.
"input.scs" 8: Unable to open library file
`/opt/eda/xfab/spectre/xc06/xc06.scs'.
No such file or directory.
spectre terminated prematurely due to fatal error.