Plate solving hangs on validation frame

Interesting that you've experienced the same as I did with ANSVR. I've not tried SGP 2.5.1.17 again so I cannot comment. I'm using SGP 2.5.1.15 and it's perfect. I will probably upgrade and try it again but I need to sort out my telescope focuser before. Takahashi don't make good focusers it seems!