The AMISYS Data Warehousing product will not run on the version of ALLBASE that comes with 5.5. You must retrofit ALLBASE (I think it is G.0 but I may be wrong.) As for running AMISYS 8.X on 5.5, I ran the AMISYS 6 loop on 5.5. You may contact me directly for further information. The AMISYS listserver may net you more answers. The address is: [log in to unmask] I don't remember the subscription procedure but its free and painless.