RE: [Zope] AttributeError: 'None' object has no attribute 'load'

Jean Jordaan writes:

FWIW, here's a summary of the substantive things I found in the archive .. Seems that your problem is new....

The only way, I may help you is to explain how I hunted my problem: I caught the "AttributeError" in a "try: ... except AttributeError: ..." and activated "pdb" in the exception handler "import pdb; pdb.set_trace()". When the problem happened, Zope stopped and I could analyse its state in the debugger. The "None" object without a "load" method came from a "_p_jar". I recognized the corresponding object, it has been one of my cached objects. I asked why it lost its "_p_jar" and the answer has been: it has been flushed from the ZODB cache. Dieter