ex1b, check lib processing

I1    9 0  -1mA
X1    9 0  sub1
R2    9 0  4k
X3    9 0  sub_in_lib

Vcheck 9 check0  1.0V

.subckt  sub1  n1 n2
.lib 'ex1.lib' RES
X1  n1 n2  sub_in_lib
.ends

.subckt  sub_in_lib  n1 n2
R4   n1 n2   4k
.ends

.control
op

echo "Note: v(check0) = $&v(check0)"

if abs(v(check0)) <= 1e-9
    echo "INFO: ok"
    quit 0
end

echo ERROR: Test failure
quit 1

.endc

.end