Decision Cube error when using Access MDb

I try to use the Decision Cube on an Access database. Trying to open a
query, very little fields in an attempt to 'keep it simple', I get the
error:

'fatal error in cache: code: 180 (c:\tp\xtab\mxstore.pas, line 964).

Does anybody have any clue how to deal with this, or can the Cube only be
used on Pdox files as shown in the demos?

Thanks,
Marcel.