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LTspice XVII error work around #Time-step-too-small

 

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On 26/02/2025 16:34, ehernan3 via groups.io wrote:
Thank you for uploading the file, but when I try to open the .zip file I get an message saying "Assert Error (WZTStamp.c@556)" The parameter is incorrect." . Would you be able to re upload the file or if there is a work around for this error as well.?
As far as I can see, there's nothing wrong with the uploaded zip, but I updated the upload with just the .lib file.

Can you normally open zip files in Explorer?

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Regards,
Tony
 

Thank you for uploading the file, but when I try to open the .zip file I get an message saying "Assert Error (WZTStamp.c@556)" The parameter is incorrect." . Would you be able to re upload the file or if there is a work around for this error as well.?
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In any case thank you again for your help.
 

I downloaded it directly from ADI's Website because the version that I have for LTspice XVII doesn't include the MAX44241.? When I checked if the component was within my version of Ltspice it wasn't.?
 

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On 26/02/2025 15:35, Andy I via groups.io wrote:
Did you use the MAX44241 model that comes with LTspice?? Or did you download the Macro Model from ADI's website?
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They are probably not the same.? (I didn't check this, but you could.)? You might find that the model that comes with LTspice, works a little better than the other one.
They're not the same. I have already uploaded the current model file to Files > Temp.

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Regards,
Tony
 

Did you use the MAX44241 model that comes with LTspice?? Or did you download the Macro Model from ADI's website?
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They are probably not the same.? (I didn't check this, but you could.)? You might find that the model that comes with LTspice, works a little better than the other one.
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Andy
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On 26/02/2025 15:02, ehernan3 via groups.io wrote:
I had downloaded the MAX44241 Spice model and Ltspice schematic from Analog's website. For some reason I get the following error message. " Analysis: Time step too small; initial timepoint; trouble with u1: desd-instance d:u1:3 " I didn't change anything within the model or schematic itself so I'm not too sure why is occurred. Please note I am limited to use Ltspice XVII and can't update my software to LTspice 24, due to my company not approving that version of the software. I was wondering if there is a work around to get that error to not show up anymore and run without any issues within LTspice XVII.
The MAX44241 model is now supplied with LTspice, as from 02/15/22. Have you been able to update your components since since that date? There is a line in the changelog suggesting this a corrected model, which implies the previous one might have been problematic.

The model supplied with LTspice is different from the one on the ADI website.

I have version LTspiceXVII 17.1.15 and the MAX44241 example circuit runs fine with the current supplied model. I have uploaded this model to Files > Temp as MAX44241.lib.zip. Try that.

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Regards,
Tony
 

Also FYI -
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The occurrence of the error tends to depend on both the SPICE part models, and on the circuit you used them in.? That model from Analog Devices might work perfectly in every other circuit they tried, but not your circuit.
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That being said, if one must put the blame somewhere, it is most often caused by deficiencies in a part's model, rather than actually caused by the circuit where it was used.? Many SPICE models today - most of them - have functions that are not as well-behaved as they should be.? Discontinuities in those functions or their derivatives are the kinds of things that can lead to "time step too small" errors.
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Andy
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"Time step too small" errors have plagued SPICE users for half a century.? It is not easy to predict when they will happen, and can be even harder to eliminate them.
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Download the LTspice FAQ file.? Open it, and read until you find the section about "time step too small" errors.? Then read that section carefully.? It has a couple dozen things to TRY, in an attempt to get around the problem.? There are no guarantees.
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Andy
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Such errors are difficult to resolve. In this particular case, where an ADI schematic won't run. I suggest a report to ADI's Engineer Zone. It should run in XVII, unless ADI say it won't.

On 2025-02-26 14:02, ehernan3 via groups.io wrote:

I had downloaded the MAX44241 Spice model and Ltspice schematic from Analog's website. For some reason I get the following error message. " Analysis: Time step too small; initial timepoint; trouble with u1: desd-instance d:u1:3 " I didn't change anything within the model or schematic itself so I'm not too sure why is occurred. Please note I am limited to use Ltspice XVII and can't update my software to LTspice 24, due to my company not approving that version of the software. I was wondering if there is a work around to get that error to not show up anymore and run without any issues within LTspice XVII.

Link:?

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I had downloaded the MAX44241 Spice model and Ltspice schematic from Analog's website. For some reason I get the following error message. " Analysis: Time step too small; initial timepoint; trouble with u1: desd-instance d:u1:3 " I didn't change anything within the model or schematic itself so I'm not too sure why is occurred. Please note I am limited to use Ltspice XVII and can't update my software to LTspice 24, due to my company not approving that version of the software. I was wondering if there is a work around to get that error to not show up anymore and run without any issues within LTspice XVII.

Link:?

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