Thanks for the input. The problem with that solution (which does work without crashing, as I stated before), is that while my upper & lower grids function, the lower combobox (VendorPartNo) is not limited by Vendor. The idea is that while working in a particular PO, for a particular Vendor, then only those VendorParts are available in the combobox - hence my attempt using the MasterLink. Whenever I point the VendorParts Keysource (with Keylink) and Mastersource (with MasterLink) simultaneously, I get "Unable to scroll dataset" or "Operation aborted" errors. What am I missing - since the Company sample appears to use this same functionality?

Daniel


[Non-text portions of this message have been removed]