Help restoring BIG-IP 1600 to factory default settings (11.3.0 build 3022.0)

I am trying to restore a Big Ip 1600 to factory defaults following guide

http://support.f5.com/kb/en-us/solutions/public/13000/100/sol13127.html

However upon entering the command "load sys config default", the following errors appear:

*root@(1600-1)(cfg-sync Standalone)(Active)(/Common)(tmos) load sys config default

Reset the system configuration to factory defaults? (y/n) y

/bin/tar: files_d/Common_d/certificate_d/:Common:xxx_1: Cannot stat: No such file or directory

/bin/tar: Error exit delayed from previous errors*

Unexpected Error: Failed to append to temp tar file "/var/tmp/tmsh/nWPAFD/data" cache path "/config/filestore/files_d/Common_d/certificate_d/:Common:xxx_1"exit code (2).

Any ideas?