The ΓÇ£PickupBkgndΓÇ¥ XCMD takes no parameters and will set ΓÇ£the resultΓÇ¥ to an error string if an error occurs. These error strings are contained in the STR# resource.
If you write a script that processes many cards, calling the XCMD directly, remember to check ΓÇ£the resultΓÇ¥ afterwards for errors.