Question

I am trying to use a template within Joomla 3.0. I installed the template on Joomla and I tried to use the preview button to see it. however I got this errors.

( ! ) Fatal error: Call to undefined function mosShowListMenu(), beside this I also get 3 other warning such as:

Warning: include_once(C:\wamp\www\HAMED\templates\jf_texturiaDS/scripts/php/mainmenu.php)

Warning: include_once() [function.include]: Failed opening 'C:\wamp\www\HAMED\templates\jf_texturiaDS/scripts/php/mainmenu.php' for inclusion (include_path='.;C:\php\pear')

Does any one know where are these errors coming from and how I can fix them?

Answer 1

The mos prefix indicates it dates from the Joomla! 1.0/1.5 error so it may not be compatible, but it’s more likely that you’re using a template that is dependent on extensions and modules by the template creator.

A quick Google search shows this results at BlueStone Design, which translates to:

After installing a new template for Joomla appears the error Fatal
error: Call to undefined function mosShowListMenu () on.

This can have several reasons:

1. Some essential modules are not yet activated. In the backend just activate all modules.
2. Some essential modules are not installed yet. In the downloaded archive again see if maybe a folder hidden in the plug-ins or modules that need will still be installed.
3. Wrong Joomla version. Perhaps the template is version dependent. Enable legacy mode to test project.

Note the reference to “Legacy Mode” this is a Joomla! 1.5 plug-in to help support old 1.0 compatible templates and extensions…