I really don't know what has happened here. I created this part late last year and recently went to modify it when I realised that some of the sketches were not fully defined (Part of the learning curve). I have tried and tried but cannot seem to fully define the 3D sketch of 'Loft 1' and it's driving me crazy because I know it's going to be something simple!
So in further investigation, I started to look at other parts that were created back in the latter part of 2016 and found that so many of my parts were undefined and some had no dimensions at all! The only thing I can think of is that in between the creation of these parts and this current day is that I had a major computer crash and had to re-install SW and with that I totally changed all of my templates. But would this have any affect?
Anyway, my part is attached and if someone could help with resolving the 3D sketch in 'Loft 1' I'd be grateful. I have removed all of the centrelines and dimension attempts that I have tried.