How do you save wcfg waveform data in Xilinx ISim clock cycle resolution

Question

I have a simulation that takes 4 hours to run and don't want to repeat it when I have to measure timing. Is there a way to save the data so that I can review it on demand.

Answer 1

The simulation data is store in a waveform database (.wdb) file. The waveform configuration file (.wcfg) contains only the selected signals and its display settings like radix, color, position, grouping, ...

So don't delete the *.wdb file and load/open it on your next run. Don't overwrite it :).