![]() That Help page also says, "internal device voltages are only of internal program development use." I'm guessing you were just confused about the wording "Internal Device Voltages". On the Help page for Control Panel > Save Defaults, it shows that the option to "Save Internal Device Voltages" does not have next to it. Therefore it is a clue about past program behavior. One more note about this (the option to "Save Internal Device Voltages"): The Help that comes with LTspice tends to run several versions behind the program, because it is not often updated for a long time, even when something was changed in the program. Most people want to know what's happening at C, B, E, and S pins, but not the other internal nodes with is too much detail for most people. I THINK those are the ones that would be saved if you enable Save Internal Device Voltages. Do you want to save subcircuit NODE voltages, or INTERNAL DEVICE voltages (which are not necessarily in subcircuits)? The schematic about half-way down the Help page for BJT transistors shows several internal device nodes, named bx, bp, si, bi, ci, and ei. It is NOT the same thing as saving subcircuit node voltages. I am not positive, but I think that option never had a next to it. I guess it refers to internal voltages inside of transistors (of which there are not many), so it is probably not the kind of thing you really need to plot unless you are someone who creates transistor models. There is that option too, in the Control Panel. I was in error when I wrote that you can't Save Internal Device Voltages. Running the 32-bit version of LTspice released 16 April plus a Sync release (which says there was nothing to update): For me, LTspice saves subcircuit voltages and currents (after they have been enabled in the Control Panel). Monday was a state holiday at Analog Device's world headquarters so that might be another delay. ![]() "I've tried e-mailing analog at: they are totally non-responsive." How long ago? I doubt they are totally unresponsive, but they may be seriously delayed, with a certain pandemic going on. ![]() I'm just saying that the "fault" might lie with Windows. ![]() Did you try other simulations, or just one? "You don't get any previews of the schematics any more." I remember reading that schematic previews come from the operating system (with LTspice's help), so maybe something in the Windows Registry lost its settings. I think there were other things too that would do that. SAVE command, that would override the Control Panel setting. And I'm assuming you mean that the checkbox in the Control Panel works, but that the voltages or currents don't get saved like they did before. Etheory, your last question first: "Is this the right forum to raise them?" Yes! "2.) Tools->Control Panel->Save Defaults->Save Internal Device Voltages doesn't work any more." I'm assuming that's a typo, because you can save Node Voltages and you can save Device Currents, but not Device Voltages. ![]()
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