Access violation at xxxxxxxx in BANTAM.DLL reading FFFFFFFF

Delphi 4.02
BDE 5.01 with native Access Driver

Access violation at xxxxxxxx in BANTAM.DLL reading FFFFFFFF  

I've got this error when building a TDecisionCube with a TDecisionQuery
on a Access Table.
It seems that it depends on the amount of data read...

BANTAM.DLL is a BDE DLL

Any idea and/or solution ???

Does any one know the limits of TDecisionCube ??

Thanks

Francois.