Comment 13 for bug 966439

Actually, the error message is the same but the actual trigger was totally unrelated and innocuous. In my case, this error message occurred when the vmbuilder command line used a -c <file.cfg> that did not exist! So while this isn't the least bit helpful as an error message, it might help others to examine the command lines (especially if they are creating multiple VMs and cutting-and-pasting commands ;-). It may also help to carefully review the contents of the -c <file.cfg>.

For what it's worth, I just happen to be using this particular command line when I encountered this VERY MISLEADING error.

     vmbuilder kvm ubuntu --part=./vmbuilder.partition -c vrootca.cfg

Once I created the referenced vrootca.cfg, vmbuilder completed without error.