szb

Go to the properties of the resistors and remove "Ohms". Resistors are already in Ohms. This is an issue, Properties definitions should be checked for correctness first.

Pls attach the schema file (*.sch)

I understand, thanks a lot!

Using switch komponent with the "dc Volatage Source" works OK. But after change to "dc Current Source" seems that qucs ignores the switch (always closed) <Qucs Schematic 0.0.20> <Properties> <View=0,-60,910,800,1,0,0> <Grid=10,10,1> <DataSet=switchTest.dat> <DataDisplay=switchTest.dpl> <OpenDisplay=1> <Script=switchTest.m> <RunScript=0> <showFrame=0> <FrameText0=Title> <FrameText1=Drawn By:> <FrameText2=Date:> <FrameText3=Revision:> </Properties> <Symbol> </Symbol> <Components> <GND * 5 140 250 0...

Using switch komponent with the "dc Volatage Source" works OK. But after change to "dc Current Source" seems that qucs ignores the switch (always closed) <Qucs Schematic 0.0.20> <Properties> <View=0,-60,910,800,1,0,0> <Grid=10,10,1> <DataSet=switchTest.dat> <DataDisplay=switchTest.dpl> <OpenDisplay=1> <Script=switchTest.m> <RunScript=0> <showFrame=0> <FrameText0=Title> <FrameText1=Drawn By:> <FrameText2=Date:> <FrameText3=Revision:> </Properties> <Symbol> </Symbol> <Components> <GND * 5 140 250 0...

Using switch komponent with the "dc Volatage Source" works OK. But after change to "dc Current Source" seems that qucs ignores the switch (always closed) <Qucs Schematic 0.0.20> <Properties> <View=0,-60,910,800,1,0,0> <Grid=10,10,1> <DataSet=switchTest.dat> <DataDisplay=switchTest.dpl> <OpenDisplay=1> <Script=switchTest.m> <RunScript=0> <showFrame=0> <FrameText0=Title> <FrameText1=Drawn By:> <FrameText2=Date:> <FrameText3=Revision:> </Properties> <Symbol> </Symbol> <Components> <GND * 5 140 250 0...