Nicolas LAURANCE wrote at 2003-3-30 12:06 +0200:

...

... I have developped a website under zope 2.5.0, mostly w/ dtml a python scripts. It is based on zclass defined in products (not external products) 3 of them were imported without pbs under Zope 2.6.1, but one of them (that has nothing special), when I import it raises :

Error Type: ImportError Error Value: No module named iclass

A well known problem with a known solution.

Please search the mailing list archives to find it.

...

.... You can take a look at my how-to. I made it moths ago, when I made my update: http://www.zope.org/Members/jmeile/upgradingZope

Regards, Josef.