In version B128 the wf stability of avg net profit per day is completely broken. It does not care about the WFM results it always displays 0%. I have tested many strategies and I have attached one matrix so that you can check it yourselves. Every strategy I tested showed 0% in any run, no matter which parameters I optimized. By the way, selecting the optimization profile tab shows that error. The installation was completely clean, I simpyl downloaded the zip B128 from your webpage and extracted the contents in a completely new folder.