I ran into this error today when I reformatted my laptop to install Fedora 20.

I installed VMware Player, however whenever I went to launch it I received a vmnet build error:

1
vthread-3| W110: Failed to build vmnet.  Failed to execute the build command.

On kernels 3.13 that have enabled the network packet filtering framework (Netfilter) will fail to build the vmnet module.

To fix this issue, which I found on the ArchWiki:

It took a bit of digging for me to find this link – so I thought I would put it somewhere more easily accessible for if (when) I run into this error again.