[almotqen]

Originally Posted by Lynne

All your sites are getting that exact same error when trying to edit a template? Are all three sites on the same server?

Yes.

Originally Posted by Lynne

Try disabling your modifications/plugins and see if you still have this problem.
Note: To temporarily disable the plugin system, edit config.php and add this line right under <?php

PHP Code:

define('DISABLE_HOOKS', true); 


I tried to do that but without result!

Do you think that the problem is due to permissions?
Because the suphp was enable on the server but then we disable it. After that this problems began to appear in my forums.

Thank you