The problem is the resolver can't resolve the path of the view template you had provided. I usually add a configuration entry for all accessible partials in the template_map entry in the module.config.php
for example
I have header and footer partials like this my view/layout/header.phtml and view/layout/footer.phtml
below is my config
'template_map' => array(
'layout/layout' => __DIR__ . '/../view/layout/layout.phtml',
'header' => __DIR__ . '/../view/layout/header.phtml',
'footer' => __DIR__ . '/../view/layout/footer.phtml',
'error/404' => __DIR__ . '/../view/error/404.phtml',
'error/index' => __DIR__ . '/../view/error/index.phtml',
),
and inside my layout view script I simply put
<?php echo $this->partial('header'); ?>
and
<?php echo $this->partial('footer'); ?>
Another if you have your partials under /module/controller/action format you can also do
<?php echo $this->partial('/module/controller/action'); ?>
you should place the view script in the view folder of your module's controller folder