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

[David Glick]

 On 9/9/10 7:03 AM, Jim Fulton wrote:
> On Wed, Sep 8, 2010 at 5:28 PM, Mike Hammill <mike at kth.se> wrote:
>> 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.
> That's annoying. :)
>
>>  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?
> Your database contains versions. Versions haven't been supported in Zope
> (and thus Plone) in years as far as I know. ZODB 3.9 no-longer supports
> versions. You can't use a database containing versions with ZODB 3.9
> (and presumably Plone 4).
Mike, we successfully upgraded an old Plone site whose database
contained ZODB versions by ZEXP-exporting the entire thing, then
reimporting into a fresh database.

David
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David Glick
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