Fatal error: require_once() [function.require]:

Failed opening required '/home/USER/MYSITE/libraries/joomla/installer/adapters/template.php'

(include_path='.:/usr/lib/php:/usr/local/lib/php')
in /home/USER/MYSITE/administrator/components/com_multisites/libraries/joomla/installer/adapters16/template.php
on line 26

I don't know why I can't uninstall a template that got installed as a duplicate. Matbe the upper error has also something to do with why it got installed as a duplicate instead of replacing the other one.

Can you provide more information on your environment.
Which is the joomla version ?
Which is the JMS version ?
Do you have that with the latest JMS 1.3.26 ?
If this is an older JMS, retry with the latest version.

Do you have that on the master or in a slave site ?

Which action are you doing to have this message ?
Which is the scenario to reproduce it ?

Do you have that when uninstalling a template from the JMS Tool menu and template tab ?

I've got the same problem/error when trying to delete joomla templates on a slave site.

I'm using Joomla 3.2.1 and JMS Multisite 1.3.27.

It isn't a problem on the master site but on the slave site it isn't possible to add or delete a Joomla template (with said above error)

Do you have any suggestions?

OK, we will retest and try reproducing it.

This issue is fixed in the JMS 1.3.28 and was affecting the uninstall of template under J3.2 (not J2.5 that was OK)

I updated JMS (1.3.28) andJoomla (3.2.2) but for me this problem still exists.

Installing new templates and deinstalling templates not possible at all.