Focus cannot be determined

Rather than successfully focusing, I get the error message : “Focus cannot be determined. Moving to start position”. When I see the presented graph, there is a clear dip, which looks like the focus point to me. Maybe it’s not the most ideal curve, but I think it’s better than just giving up, which is what SGP does. I have the log file, and was hoping somebody could take a look at it and help me figure out what is going on.

??I tried to upload my log file, but it would not accept a .log or a .txt file. How am I supposed to upload this?