Inventor Crashes

[lemiant]

Hi everyone,

I am quite new to Autodesk Inventor 2011. I have been making parts, and doing tutorials for the past week, and Inventor has been perfectly stable. However, finishing a specific sketch has become impossible, because every time I try to add a specific constraint, it crashes. I have posted the file at:

http://host.codingproject.net/Lift.ipt

I have added a couple of things, to help you find the error: There is a line sticking out of the rectangle; If you follow the line into the rectangle, it ends at a point. That point is in between two triangles. And if you try to add a dimension from the right side of the left triangle to the left side of the right triangle, Inventor crashes.

Does anyone know how this could be fixed?

Thanks,

Lemiant