Did you have a look at the Scripting index?
Manage Spec limits needs a certain format like the below script shows.
Or see JMP Help: Manage Spec Limits Utility (jmp.com)
If you want to set it manually, you need to use a specific syntax, like below. Have a look at the "table Script" to see the syntax.
Names Default To Here( 1 );
dt = Open( "$SAMPLE_DATA/Cities.jmp" );
obj = dt <<
Process Capability(
Process Variables( :OZONE, :CO, :SO2, :NO ),
Spec Limits(
Import Spec Limits(
"$SAMPLE_DATA/CitySpecLimits.jmp"
)
)
);
obj << Save Spec Limits to New Table;
Set Property( "Spec Limits", {LSL( 16 ), USL( 24 ), Target( 20 )} ),
Georg