[ZODB-Dev] "Versions aren't supported" message in Plone 4 upgrade

[Mike Hammill]

Just wondering if anyone could point me in the right direction.

I'm getting the error:

ValueError: Non-zero version length. Versions aren't supported.

when trying to bring up a Data.fs from Plone 3.3.1 in Plone 4.0.0.  The
Data.fs file was made by doing a snapshotbackup of a production Plone
3.3.1 and then snapshotrestore under Plone 4.0.0.  The full error is at
<http://pastie.org/1146604>.  #plone folks suggested I ask here.  Is
this a corrupt database?  Do I have to upgrade 3.3.1 to some newer 3.3.x
before 4.0.0?  Any ideas?

Regards,
/Mike