Warning with JoomlaFCK editor 3.4.2.

I have installed last version of JoomlaFCK 3.4.2, all working very well, but when I open any document with them I get next message:

Warning: /home/xxxxxxxx/public_html/templates/hot_architecture/css/template.css or /home/xxxxxxxx/public_html/templates/hot_architecture/css/template.css.php does not appear to be a valid file. Reverting to JoomlaFCK's default styles

How I can switch off that message?

HI,
In the FCK settings in the Plugin Manager, you can specify the location of your default style template. The field is titled 'Use Custom CSS Classes?'

Name of css file for HOT ARCITECTURE template is:

/templates/hot_architecture/css/template_css.css

Normally need to be /templates/hot_architecture/css/template.css

I made copy of:
template_css.css to template.css
and
template_css.php to template.php

All works. Is that problem for your template?

Template developers can name CSS files how they want, so it's not issue for us. However, you can rename css files if you like to use JoomlaFCK. Don't forget to change link to CSS file in index.php of the template.

OK, I know that is not strong rule. I live original your css file, only made copy with new name on same place, therefore it seams all running very well.
Problem might be if I want to change the original css I need to modify and copy of them.

No. Simply rename our template_css.css to template.css. Then edit index.php page and change link for template_css.css to be template.css. Then you can work with and edit only template.css in future.

Also, check JoomlaFCK settings. It maybe have option to change default CSS file name.