I'm using Synopsys to synthesize designs. I've noticed that when I synthesize exactly the same design several times, I get different synthesis reports.
When I launch the tool for the first time, synthesize the design, read the report ; then, close the tool and resynthesize the same design, then I get the same results. But if I perform the same synthesis without closing the tool, results aren't the same.
I think this must have to do with some history files, but I'm not sure. Anyone else had this problem ? How can I solve it ? Is there a way of reseting the tool in a script so that this does not happen when I perform synthesis without quitting the tool ?