# Why did I get “Internal polygon error 71” in eagle?

I attempted to create a ground plane for my circuit with the polygon command but this time, I get a weird problem. Normally when I create a rectangle and rename the polygon to GND (ground), I'm asked what the new name of the track should be and then the blank spots of the circuit board are filled in mostly with GND which is normal.

However, this time, I did the same thing to a bit more complex of a circuit, and just after drawing the polygon and associating it with GND, I get the following error:

Error:

ABORT: Internal Polygon Error 71


It gives me an OK and cancel button to click on. Once I click on either button, the entire program immediately exits.

What could cause this? and I'm using Eagle 4.16r2.

• Picture please. Are any parts of the polygon overlapping? – Tom Carpenter Oct 12 '16 at 7:22
• Nobody is going to give a crap what problems you encounter in version 4 of Eagle. The current version is 7. – Olin Lathrop Nov 11 '16 at 12:57