I'm seeing this error: "sta.tcl, 122 can't read "::env(CLOCK_PORT)" : no such variable". Could some help, please?

You'll probably need to add a virtual clock for the input and output delays even if it is purely combinational

Thank you. Is there a way to add virtual clock in the configuration file?

I think if you just specify a port that doesn't exist it will be virtual. It will say that it is virtual as a message

Thank you very much. It's working perfectly.