On Linux PcbNew Edge Cuts are generated with the extension .gm1 instead of .gml

[Benjamin Summerton]

In my window's titlebar it says the version is "Pcbnew 4.0.2+e4-6225~38-ubuntu15.0.1-stable1"

After I was done working with my layout I generated the plot & drill files. For the Edge.Cuts layer, the file extension given to is was `gm1` instead of `gml`. I'm not sure if this was a typo or something, but when I tried to upload by board to a fab service, they gave me the error "No board boundary detected."

When I renamed the extension for the edge cuts to `gml` and re-uploaded it the fab service accepted the boards with no issue and the preview looked correct.

[Chris Pavlina (pavlina-chris)]

Hm. There are different naming schemes here, there's .GML which is "Gerber, Mechanical Layer" and .GM1 which is "Gerber, Mechanical #1". I've seen fabs expect either one of those. Wonder which is standard...

[jean-pierre charras (jp-charras)]

Nothing is standard.
Only .gbr is standard. Gerber X2 identify the file function.

[Chris Pavlina (pavlina-chris)]

"Standard" might not be the best choice of words there. They're supposedly Protel extensions, right? What did Protel use?

[Benjamin Summerton (def-pri-pub)]

In an older version (I think about a year or two ago), it was generationg the `.gbl` extension for me. When did it switch over?

[jean-pierre charras (jp-charras)]

AFAIK, in Protel extensions, .gbl is the back (bottom) copper layer.

[Benjamin Summerton (def-pri-pub)]

Yeah, the plotter did generate a .gbl file for the B.Cu layer. The fabbers said there were no problems with that file.

[jean-pierre charras (jp-charras)]

It looks like not extension is actually defined in "protel" ext.

Here is a link to a board house which uses .gm1
http://daycounter.com/LabBook/Protel-Layer-File-Extensions.phtml

There are some other links with different extensions...

Because there is no way to know what extension should be used, I set the report as "won't fix".

I encourage you to use the Gerber X2 format without protel extension to avoid this kind of issue.