SNG7 Upgrade Failure - IOError: [Errno 28] No space left on device

Just having a look at this post, it suggest that turning off wanrouter might solve this - Upgrade to FreePBX 14 from 13 failing

If I have understood correctly, wanrouter is for a physical card to connect to external lines. This machine is a virtual machine and we use SIP trunks to connect to external lines. So should be ok running this command?

chkconfig wanrouter off

Any advise would be great.

Many Thanks