I'm pretty sure that I have isolated a problem with the shared data table key and I have a secondary problem on how the filter is handled.   I'll see if I can explain.   If you create a BO and specify a SDTK( Shared Data table Key ) then the first time that the BO is instantiated and filled everything is fine.   But for some reason if there is a Object or Form that Dispose of the last instance of that class then the SDTK is now a bug and upon the first new instance of the Same BO type then the DataRow Index will be all messed up.   It looks like the Finalize of the BO does not removed the SDTK from it's collection for SDTK keys.   I'm pretty sure that this bug is the reason for a couple of the SDTK posts.

Second problem with SDTK.  Filters.   If you are using 2 BO that are bound with a SDTK and you filter one of them the second is filtered.  Is there a reason for this?  For my thought process is for lookups that rarely get update or automatically notified if DB changes then having a BO with a SDTK would work well and does.  Up until one of those BO's are filtered for some reason and then All of the BO's are filtered.   This obviously messes up a bunch of things.  

Any ideas?

Richard