Pcbway not seeing layers

[finalman]

So I'm building a few simple and small two sided adapter boards that have afew static Via's that go through the board. The only things on the bottom of the boards are the Via's and trace/s that join them together.

Now when I load these into pcbway they fail verification with a no bottom solder mask layer error. Even though the file exists inside the uploaded Gerber zip file. However if I put a mounting hole or a through-hole pad the error goes away. Though I don't need a mounting hole or a through-hole pad for these boards.

Also if I don't have anything in the silkscreen layers and with the layer files exported and confirmed to be in the Gerber .zip file Pcbway fails verification stating that I have a don't have a bottom silkscreen layer.

Anyone had any similar issues with pcbway and how did you fix them?

[Alex]

PCBWay online viewer fails if you load empty Gerber files. Once you add something on the layers then Gerber files are viewed normally.
You can click on "Files" button on export Gerber dialog window and exclude empty Gerber layer from "Export All" option.

[finalman]

Easy fix was I placed a mounting hole and a dot on each silkscreen layer outside of the board points.

[finalman]

Another issue I've just had happen is I've got a few Diptrace projects where Diptrace 3d window shows correctly with the solder mask completely covering the bottom layer but the PCBway Gerber viewer shows the bare copper so no solder mask layer at all.