Inventor Fusion

[#1]

Hi.

I've been working and got the following error trying to save: "Object reference not set to an instance of an object"

I've pinpointed the cause of the error. I can save until a fillet 2 lines. 

This is Inventor Fusion 2013 on Windows 7 x64 Pro.

Any clues?

[#2]

Does this happen with any fillet between two sketch lines?

[#3 · Accepted solution]

In the end I found out that it was that the radius was to large, once I learned how to use the tool, everything went A-OK