Quote Originally Posted by birchy View Post
Dunno mate, I haven't ventured into the world of 3D yet. And I'm not a Windows or Autocad/Inventor user, sorry.

That would suggest either a wrong "default" setting, a software bug or something weird within your drawings. Have you tried replicating this "bug" on a brand new drawing? It's probably something really silly and you'll kick yourself when you find it. Check the drawing layers? The autodesk forums will probably get you better results than here...
Thanks again, Yeah - I have done maybe 15 seperate drawings so far.

People on the Autodesk website have no Idea either haha

Here is the thread if you want to take a delve into it?

2D line snapping over 2 seperate sketches. - Autodesk Discussion Groups