ex1a, check lib processing

I1     9 0  -1mA
X1     9 0  sub1

Vcheck 9 check0  1.0V

.lib 'ex1.lib' RES

.subckt  sub1  n1 n2
X2  n1 n2  sub_in_lib
R2  n1 n2  2k
.ends

.control
op

print v(check0)

if abs(v(check0)) > 1e-9
  quit 1
end

echo "INFO: ok"
quit 0

.endc

.end