LyX ⇒ How to use a custom LaTeX class in LyX?

[c1b3rz]

Hello.
I'm writing my thesis, and my university offers a LaTeX template for it.
In my first search on how to do it, I've came across this website: http://www.briandalessandro.com/blog/ho ... ss-in-lyx/. I've tried doing what it says (and indeed I can choose the new document class inside LyX) but I get the following error:

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l.8 \usepackage {amsthm}
The package inputenc has already been loaded with options:
[ansinew]
There has now been an attempt to load it with options
[latin9]
Adding the global options:
ansinew,latin9
to your \documentclass declaration may fix this.

So I tryied looking at the .cls and the .style file I had created, and the only reference to the package I found was at the .cls file, which was:

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\RequirePackage{amsmath, amssymb, amsfonts, amsthm}

and nothing else.

First of all, is this way of adding a new class to LyX fully functional? Or is there a safer, more consistent, way of doing so?
If this way works, what and where should I look to try to fix this error?

FYI, I'm using LyX 2.0.4 and MikTex 2.9.
The template can be found here: http://www.bu.ufsc.br/design/template.zip

Thanks in advance for any tip or guidance.

[cgnieder]

I tried to test this but I failed since I haven't the abnt bundle installed. However, the problem is that the the custom package »BUUFSCThesis.sty« from your university does something it shouldn't do: it loads »inputenc« as follows:

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\usepackage[ansinew]{inputenc}

A class or package should never do that as it cannot know which input encoding users will need or want to use. My guess is that LyX also loads inputenc at some point which then causes trouble. You could try the following: comment the offending line (35) in the sty file like this:

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% \usepackage[ansinew]{inputenc}

Regards