Multisim and Ultiboard

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Is Multisim not good for simulating voltage reference and regulator?

Hello.

 

I'm using Multisim 13 and the file with problem is attached.

 

When you open the file you can see two circuit. One is main circuit and the other is voltage reference. They're seperated.

 

When I run the simulation and see what's going on on oscilloscope, there is nothing! But If I do the same thing with removing voltage reference circuit and leave only main one. It runs successfully.

 

I thought they're really seperated thus each circuit can't influence the other. What happens?

 

Originally I had planed to replace V2 as a supply voltage source to optocoupler with the voltage reference, but It hadn't work.

 

Every trial of connecting voltage reference or regulator listed in Multisim library to the main circuit makes simulation no run.

 

Could you tell me what's going on?

 

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