LTSpice anomaly. Same wire, different voltages. - Page 4 - diyAudio
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Old 2nd February 2013, 07:53 AM   #31
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Well the fact it put the voltage of seemingly random nodes in before the rerun is to my mind a bug. If they can't be determined (which seems odd since the hover can) at the time of adding the tag, then they should show undefined IMO

So the solution is just to run the sim again.

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Old 2nd February 2013, 10:46 AM   #32
Elvee is offline Elvee  Belgium
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Quote:
Originally Posted by wintermute View Post
Well the fact it put the voltage of seemingly random nodes in before the rerun is to my mind a bug. If they can't be determined (which seems odd since the hover can) at the time of adding the tag, then they should show undefined IMO
I agree, that is useless and misleading.
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Old 2nd February 2013, 11:01 AM   #33
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I'd say it was bug too...

Quote:
Originally Posted by powerflux View Post
..........it's not a bug, that's the way ltspice does it. The waveforms (and all node voltages) are stored after a run.
That's what I am doing. Running the simulation and attaching one voltage tag to the line. And its incorrect. In attaching that tag its also changed the nodes.

When you try other points on the circuit the same thing happens but its very inconsistent as to what changes and what doesn't.

So it seems its just the way it is
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