Perk SDK script returns nothing

I'm trying to configure Icinga to monitor my VMware environment and I've hit a wall.

I am using Ubuntu 16.4 LTS as the base OS. I've installed all of the perl modules for the SDK and installed the SDK. However when I try and run vminfo.pl for exmaple, it just sits there.

My perl version is 5.22, is there any checks or logs I can view to try and fix this?

Thanks