I'm not an eagle user, but 0.023622* is 0.6 mm whereas 0.024 is the next rounded imperial size up. Any chance that it has mixed units issues between the auto via and DRC functions? ie it looks conceivable that it has implemented the auto vias in metric while otherwise working in imperial and no has a NASA Mars lander thruster type crisis. Russell * 0.02362204724409448818897637795276 .... " --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .