as far i know this is not allowed because the framework internally splits strings on 'tpl/'
better use
protected $_sThisTemplate = "ib_dependencyManager_deps.tpl";
in ib_DependencyManager\application\controllers\admin\ib_dependencyManager_dependencies.php
and according in metadata.php
as far i know this is not allowed because the framework internally splits strings on 'tpl/' better use protected $_sThisTemplate = "ib_dependencyManager_deps.tpl"; in ib_DependencyManager\application\controllers\admin\ib_dependencyManager_dependencies.php and according in metadata.php