got trouble with orcad tutorial

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bbexpress

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orcad loop inductor and source

I followed the steps tutorial of orcad in documentaion, I draw a circuit on page 56(Clipper), but when I simulate, I got some messages:
ERROR -- Node VCC is floating
ERROR -- Node IN is floating
ERROR -- Node MID is floating
ERROR -- Node OUT is floating
ERROR -- Voltage source and/or inductor loop involving V_Vin
You may break the loop by adding a series resistance

Does anyone know what happened to my sw?. Any tutorials ebook or comments are appreciated. Thank you.
 

error -- node vcc is floating

Go to the .cir file with a text editor like wordpad and see how many circuit components are connected to these nodes. The program always requries at least two components (if I remember right). Look on the schematic for the dot where two traces cross and you want them to be connected. Perhaps you could upload the schematic file for others to view.
 

thank you flatulent,
Im using Orcad9 on windows XP, i'm not sure it work or not
I uploaded my simple circuit. Can anyone check for me please.
Thank all.
 

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