Fillet Creating 3D corner

[jon_alfo27]

Hello,

I have been following the Autocad certification prep and I'm on "Control the User Coordinate System". The presenter fillets the corners of the rectangle but in my project I'm getting a 3D corner instead of a 2D corner and I'm unable to figure out why this is happening when following her exact steps. File is attached.

Kind regards,

[Kent1Cooper]

TRIMMODE is not a by-drawing setting, so you must have it set to NOTRIM in your Registry.  If you set it to TRIM [in the Fillet command, or by setting the System Variable independently], does it work as you expect?

[dmfrazier]

The thickness property of the arcs produced by Fillet is -1.

Can you think of a reason why?

[jon_alfo27]

Oh I have no idea that was set to -1, I surely did not put it that why so don't know why that was like default. Thank you for finding the problem!