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Devon_H
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This circuit has no power sources: unable to determine the simulation timestep automatically.

Whenever I try to run any circuit, it tells me that there is no power source? Anyone have any idea what that's about?

"This circuit has no power sources: unable to determine the simulation timestep automatically.
Please add a power source or set the simulation timestep under "Interactive Simulation Settings" to proceed."

I'm a student and this is my first time using software like this.
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lacy
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Re: This circuit has no power sources: unable to determine the simulation timestep automatically.

[ Edited ]

In a situation like this you need to post your circuit file for us to analyze. It is hard to determine just from your desciption as to what would cause this.

 

Message Edited by lacy on 08-03-2007 01:45 PM

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Devon_H
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Re: This circuit has no power sources: unable to determine the simulation timestep automatically.

Sorry about that. Even the circuits that I get right out of the textbook don't seem to work, but I'll post one here.
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lacy
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Re: This circuit has no power sources: unable to determine the simulation timestep automatically.

I tried your circuit on both Version 10 and Multisim 2001. It worked fine on both with no errors. I could not re-produce your error. I don't know what to tell you. I will continue trying to reproduce your error. If I find anything I will post it. I
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Devon_H
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Re: This circuit has no power sources: unable to determine the simulation timestep automatically.

The error says the simulation timestep... is this how my Interactive Simulation Settings should be set?


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lacy
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Re: This circuit has no power sources: unable to determine the simulation timestep automatically.

The only way I was able to even get this error was to remove the power source while having the scope on the screenand tied in the circuit. Have you tried replacing the files voltage source with one from the database?  Try that and see if it works.
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lacy
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Re: This circuit has no power sources: unable to determine the simulation timestep automatically.

This is the default setup and it mirrors my setting. It should simulate just fine using all default settings. Even as I am typing this it is running happily with no errors. You can try what I posted previously. What version do you have?

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lacy
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Re: This circuit has no power sources: unable to determine the simulation timestep automatically.

I want to re-ask my last question. What Version do you have? Is it a Demo or one of the Packages Student, Full, or Pro? 
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Devon_H
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Re: This circuit has no power sources: unable to determine the simulation timestep automatically.

My version is 10.0.144 Pro. I've tried making my own circuits with the voltage sources in the database and it doesn't seem to help.

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lacy
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Re: This circuit has no power sources: unable to determine the simulation timestep automatically.

You may have to try to repair your install. This is the reason I asked the questions. Follow the procedure below. This is the only thing I think might help. I don't know why this problem is occurring other than maybe something got corrupted in your install.

1. Put your CD in your Drive

2 Goto where you installed the program. this is usually C:/Program Files/National Instruments. Open the National Instruments folder.

3 Find the Shared Folder. Open it.

4 Find the NIUninstaller Folder. Open it

5. Find the program labeled "uninst". and click it

6 In the menu that pops up select your product i.e "NI Circuit Design Suite 10" or what ever it is labeled as. Then click repair.

This should repair your install if something has happened that has corrupted it in some way. It will not erase any circuit or project files that you have.

I can't think of anything else other than software files that may have become corrupted or are missing that could cause this. I have tried everything within the simulator to recreate this and the only thing that gives me this error is deleting the power source off the schematic. It is like yours is not recognizing the part for the power source.

This is about all I have on this. I am hoping this solution (even though it is a last resort) will correct the problem.

 

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