How do I open my previous simulation result waveform in ModelSim? - How do I open my previous simulation result waveform in ModelSim? Description ModelSim automatically saves your previous simulation results in a .wlf file. To open that, you need to go to the wave view and click on File -> Open dataset and browse to your project's .wlf file. Then in the main window, type in the following: add wave -r * Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']