Schematic crashing Qucs 0.0.19 whenusing "Calculate DC bias"

DC_bias_crash.sch

<Qucs Schematic 0.0.19>
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  <DataSet=DC_bias_crash.dat>
  <DataDisplay=DC_bias_crash.dpl>
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  <FrameText2=Date:>
  <FrameText3=Revision:>
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  <R R2 1 450 290 15 -26 0 1 "6 kOhm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "US" 0>
  <R R3 1 450 410 15 -26 0 1 "2 kOhm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "US" 0>
  <R R4 1 310 210 15 -26 0 1 "20 kOhm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "US" 0>
  <R R5 1 310 390 15 -26 0 1 "2.5 kOhm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "US" 0>
  <GND * 1 450 500 0 0 0 0>
  <R R6 1 690 270 15 -26 0 1 "13 kOhm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "US" 0>
  <R R7 1 610 170 15 -26 0 1 "10 kOhm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "US" 0>
  <Vdc V1 1 70 290 18 -26 0 1 "Vin" 1>
  <GND * 1 70 380 0 0 0 0>
  <R R8 1 870 330 15 -26 0 1 "3 Ohm" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "US" 0>
  <GND * 1 870 420 0 0 0 0>
  <.DC DC1 1 130 640 0 43 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0>
  <.SW SW1 1 350 640 0 71 0 0 "DC1" 1 "lin" 1 "Vin" 1 "0" 1 "30" 1 "301" 1>
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