=== stdout === Note: No compatibility mode selected! Circuit: * auto-generated testbench for decoupling analysis: /00000000-0000-0000-0000-00005ed4bb5b/+5v rail Doing analysis at TEMP = 27.000000 and TNOM = 27.000000 Using SPARSE 1.3 as Direct Linear Solver No. of Data Rows : 1201 z_min = 7.76885e-03 at= 1.67880e+06 meas ac f_at_zmin when z_mag=7.768850e-03 failed! z_at_1m = 9.25020e-03 z_at_100k = 7.81266e-02 ngspice-46 done === stderr === Error: measure f_at_zmin when(WHEN) : out of interval Error: &f_at_zmin: no such variable.