I believe that this is still a bug. Unchecking "all-layers"
clearly suppresses any layer with no apertures. This is
incorrect behaviour for the bottom-mask when there are
tracks on the bottom layer.
Checking the "all-layers" is a work-around - but isn't ideal -
perfectly valid PCBs require manual intervention to generate
gerbers correctly.
Hi Bert,
I believe that this is still a bug. Unchecking "all-layers"
clearly suppresses any layer with no apertures. This is
incorrect behaviour for the bottom-mask when there are
tracks on the bottom layer.
Checking the "all-layers" is a work-around - but isn't ideal -
perfectly valid PCBs require manual intervention to generate
gerbers correctly.
David