On 09/25/2017 10:35 AM, Patrick Dupre wrote:
No, It do not have the layout!

Well, there's your problem. No layout, no using the class with LyX. If you can find an osajnl.layout file somewhere online, deposit it in your local layouts folder, reconfigure and restart LyX, and you should be able to continue. If not, I suspect you will need to cobble one together. Typically, one starts with a layout file for a similar class and modifies it as needed to handle specific features of the new class.

Paul

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