I’ve gone over the three responses by  liviuslivius, Dimitry Sibiryakov and Frank_Schlottmann-G=c3=b6dde.

I must have misunderstood something in the documentation so I switched the VendorLib in the TFDPhysFBDriverLink back to fbclient.dll.

Liviuslivius: In FDConnection1 settings are the same as what you describe, I checked and by default the providers line was commented out in firebird.conf and I edited it to only be ”Providers = Engine12”

Frank_Schlottmann: I also followed your directions but the version 3 dll’s are the same name but they have 52 instead of 62.

One thing, my application is 64bit and I do have the 64bit fbclient.dll in the Debug / application so can you connect to an embedded database at design time by checking the Connected property of the TFDConnection component? I remember reading somewhere that during design time that since the IDE is 32bit that in certain instances there may be a bitness problem between design time and run time? But regardless of if it’s designed time or run time I still get “Database unavailable”?