[Zope] Re: 2.6 to 2.10 migration: RuntimeError: maximum recursion depth exceeded

[J Cameron Cooper]

Jonas Meurer wrote:
> On 12/07/2007 Andreas Jung wrote:
>>>>> after importing a product from zope 2.6.4 to a 2.10.3 instance, trying
>>>>> to open the product produces quite a lot of errors in my event.log, and
>>>>> a traceback in the zope management interface.
>>>> Importing as zexp? If yes, this is unsupported.
>>> Yes, I imported the Product as zexp. Why is that unsupported, and how
>>> else may I import it? It doesn't exist in the filesystem hierarchy, as
>>> it's a custom Product which was developed in the ZMI.
>> .zexp export/import is only supported between identical versions. It's not
>> a migration tool.
> 
> So is there any supported way to migrate a ZClass Product which only
> exists in the Zope hierarchy?
> 
> I know that ZClasses are depreciated in zope 2.10 anyway, but still the
> problem remains for migrations from zope 2.6.4 to 2.9 for example.

If by "migration" you mean "upgrade", then you do it the same as you 
would upgrade any other Zope instance: copy the ZODB to an instance of 
the new software.

        --jcc

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