This is related to the recent snoboard API changes.
Unfortunately some of the absolute numbers have been removed, which is really unfortunate. Though there was some suggestion in that topic that they may be added back.
If you want to help prevent such errors from appearing in community tools, I also suggest voting for this suggestion to implement API versioning.
Storagenode API versioning
I know @Vadim is really good about keeping things up to date, but the way it works now, anyone who built some tools for storage nodes can only really start fixing things when the release that breaks it is out in public.