Normally the stop mask layer (29) is not visible. But when I made it
visible with View /Display-Hide Layers then ran the DRC, it came up
with a zillion stop mask errors - essentially everywhere there was a
stop mask. Turn off visibility and no more errors. Why does making
the stop mask layer visible affect whether or not there is an error?
I am using Eagle 6.0 on a Windows 7 computer.
Robert Scott
Ypsilanti, Michigan