Today we got a new warning from Eagle’s CAM processor when exporting gerbers to make PCBs. When the CAM processor started we got the error “Board contains a polygon that may cause extremely large plot data”. After some removing nearly every component from the PCB, we found that it was related to the arrows on the silk shown above. The edges have a sharp angle, and the polygons at the tips have a width of zero. To correct the issue we changed the offending polygons’ width to positive value.