Magento - Magmi PHP errors

I'm currently trying to implement Magmi on our Magento setup but getting the following errors on the first Magmi page, this is just going to the first page and not running anything yet (obviously direct path has been replaced in the below info):

Notice: require_once() [function.require-once]: 1. h->opened_path=[/path/to/root/magmi/inc/magmi_version.php] h->filename=[/path/to/root/magmi/inc/magmi_version.php] in /path/to/root/magmi/web/head.php on line 5

Notice: require_once() [function.require-once]: apc_cache_find [33623919] in /path/to/root/magmi/web/head.php on line 5

Notice: require_once() [function.require-once]: 1. h->opened_path=[/path/to/root/magmi/inc/magmi_config.php] h->filename=[/path/to/root/magmi/inc/magmi_config.php] in /path/to/root/magmi/web/magmi.php on line 2

Notice: require_once() [function.require-once]: apc_cache_find [33623914] in /path/to/root/magmi/web/magmi.php on line 2

Notice: require_once() [function.require-once]: 1. h->opened_path=[/path/to/root/magmi/inc/properties.php] h->filename=[/path/to/root/magmi/inc/properties.php] in /path/to/root/magmi/inc/magmi_config.php on line 2

Notice: require_once() [function.require-once]: apc_cache_find [33623920] in /path/to/root/magmi/inc/magmi_config.php on line 2

Notice: require_once() [function.require-once]: 1. h->opened_path=[/path/to/root/magmi/inc/magmi_statemanager.php] h->filename=[/path/to/root/magmi/inc/magmi_statemanager.php] in /path/to/root/magmi/web/magmi.php on line 3

Notice: require_once() [function.require-once]: apc_cache_find [33623917] in /path/to/root/magmi/web/magmi.php on line 3

Notice: require_once() [function.require-once]: 1. h->opened_path=[/path/to/root/magmi/inc/fshelper.php] h->filename=[/path/to/root/magmi/inc/fshelper.php] in /path/to/root/magmi/web/magmi.php on line 5

Notice: require_once() [function.require-once]: apc_cache_find [33623909] in /path/to/root/magmi/web/magmi.php on line 5

Notice: require_once() [function.require-once]: 1. h->opened_path=[/path/to/root/magmi/web/magmi_web_utils.php] h->filename=[/path/to/root/magmi/web/magmi_web_utils.php] in /path/to/root/magmi/web/magmi.php on line 6

Notice: require_once() [function.require-once]: apc_cache_find [33623950] in /path/to/root/magmi/web/magmi.php on line 6

Notice: require_once() [function.require-once]: 1. h->opened_path=[/path/to/root/magmi/web/magmi_config_setup.php] h-&开发者_如何学编程gt;filename=[/path/to/root/magmi/web/magmi_config_setup.php] in /path/to/root/magmi/web/magmi.php on line 26

Notice: require_once() [function.require-once]: apc_cache_find [33623940] in /path/to/root/magmi/web/magmi.php on line 26

Notice: require_once() [function.require-once]: 1. h->opened_path=[/path/to/root/magmi/inc/dbhelper.class.php] h->filename=[/path/to/root/magmi/inc/dbhelper.class.php] in /path/to/root/magmi/web/magmi_config_setup.php on line 4

Notice: require_once() [function.require-once]: apc_cache_find [33623912] in /path/to/root/magmi/web/magmi_config_setup.php on line 4

and so on...

Has anyone come across this problem before?