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LTspiceIV (scad3.exe) not found, How do I use LTspiceXVII?

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Message 1 of 35
p-brane
13245 Views, 34 Replies

LTspiceIV (scad3.exe) not found, How do I use LTspiceXVII?

Greetings,

I created a circuit with Eagle 8.0.2 to simulate using LTspice. When I hit the LT Spice button, I get the error LTspcieIV (scad3.exe) not found from Eagle: ltspcie.ulp. I've installed the latest version of LTspice XVII which is designed for use on Windows 7, 8, and 10. LTspiceIV is for windows XP which will not be supported much longer. Is there an update or a ulp that will use the newest version of LTspice XVII? If not, are there any instruction on modifying the ulp to use LTspcieXVII?

34 REPLIES 34
Message 2 of 35
jorge_garcia2
in reply to: p-brane

Hello P-brane,

 

I hope you're doing well. The LTspice ulp that ships with EAGLE isn't compatible with LTspiceXVII. With that said prior to the acquisition I had been working on porting it over to work with LTspiceXVII and across all three operating systems however it's not 100% complete, I still haven't finished the Mac port. Since you are one Windows it will work for you.

 

You can download the updated ULP in its current state from here:

https://github.com/cadsoftcomputer/EAGLE-LTSpice-port-to-Linux-and-Mac

 

It's not an official release but if you need any help please let me know and I'll help you out.

 

Please accept as solution if my post fully resolves or you issue, or reply with additional details if the problem persists.

 

Let me know if there's anything else I can do for you.

 

Best Regards,

 



Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 3 of 35
p-brane
in reply to: jorge_garcia2

Hi ​Jorge,

I follow the instruction, but get the following error:

 

../ltspice.ulp(3971): Number of arguments for function 'assign_rootpath() is incorrect

 

Export and export setup produces the error. The icons for dignlink.png and LTspice.png are missing too. It seem like Eagle does not know about the location or path of LTspiceXVII. Is there an environment variable that needs to be defined?

Message 4 of 35
jorge_garcia2
in reply to: p-brane

Hi p-brane,

I hope you're doing well. I've recently updated the github, because I ran into that same error. I fixed it already, but I still have one more to resolve. I will let you know once I have the other issue resolved. I hope to have it fixed before the end of the week.

Sorry for the inconvenience.

Best Regards,


Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 5 of 35

I tried the suggested download and got the error message: 

 

C:/EAGLE 8.1.0/ulp/ltspice.ulp(697):

Unable to open the include file
'debug.ulp'

 

Thanks for the help!

Message 6 of 35

Hi minusculelighting,

I hope you're having a good day. The github link includes the debug.ulp, you have to copy it to your ulp directory so that the ULPs will recognize it there.

The port isn't done yet which is why I have the instrumentation still in the ULP. I still have some work to do on it.

Let me know if there's anything else I can do for you.

Best Regards,


Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 7 of 35
rpolzi
in reply to: p-brane

Hi,

We are also having a similar issue with spice.

I also replaced the .ulp with the ltspice.ulp from GitHub but getting a similar message c/eagle 8.2.0/ulp/ltspice.ulp(1): Unknown identifier 'Skip'

Did i miss anything?

Kind Regards, Craig

Message 8 of 35
jorge_garcia2
in reply to: rpolzi

Hi Craig,

I hope you're doing well. Could you post some screenshots of what you are seeing, as far as I can see I don't have the word skip anywhere near that line of the ltspice.ulp. Keep in mind that you also need to include the other files up on the github page.

Please let me know if there's anything else I can do for you.

Best Regards,


Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 9 of 35
jonfrey2013
in reply to: jorge_garcia2

I have installed updates from github with some success.

 

I  deleted all prior versions of the files related to LTspice interface and installed per git hub instructions

One instruction error is lib folder vs lbr folder ?

 

I was able to import a simple schematic  from latest LTspice version i

 

I  have two problems

 

1)Icons for the ULP's on the toolbar are not loading

 

2)I am stuck in debug mode , having to step through the debug screens to use the  import function

 

Have not tried export , only planning to use import at  this time .

 

Thanks

Message 10 of 35
jorge_garcia2
in reply to: jonfrey2013

Hi jonfrey2013,

I hope you're doing well. Thanks for commenting.

As far as issue 1 is concerned, I don't include the icons on the github so those would have to be grabbed from the Windows version.

I'm sorry about issue #2, using a text editor you can comment out the debug windows. Just search for "done = Debug" and you'll find all of the debug entries.

Please let me know if there's anything else I can do for you.

Best Regards,


Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 11 of 35
clamm2NFTR
in reply to: jorge_garcia2

Hi there Jorge

 

Trying to get your LTSPICE XVII ULP to work on Windows 7 x 64, thanks for writing this code.

 

Tried to install all the new files, I think I got it right?

 

But when I go through LTSPICE setup in Eagle, using new ULP  I get this error:

 

Can't open C:/Eagle/8.2.2/eagle-ltspice

 

I can say Cancel, but i think export setup didn't work...when trying to export a schematic after saying cancel I get the whole "Spiceorder not found" errors I got before I tried to new ULP's at all, for every part in my schematic

 

Did I do something wrong? 


Thanks in advance for your help!

 

--Charlie

 

 

 

Message 12 of 35
clamm2NFTR
in reply to: p-brane

Hi again

 

I also have an ubuntu 14 machine.  I could install Eagle on that along with wine-ltspice but does your ULP work on linux? 

 

Can the Linux Eagle ULP "jump to wine" to run LTspice?  If so I can give that a try, but I am not sure if the ULP can cross operating systems.  If it won't I probably will focus on fixing the Windows ULP issue I wrote about earlier today.

 

Thanks again Jorge

 

--Charlie

Message 13 of 35
jorge_garcia2
in reply to: clamm2NFTR

Hi Charlie,

It can run on Linux and it does automatically jump to WINE. If you are having any issues send me a direct message and we can setup a screenshare to get everything working.

This interface works, but it's a pain to get working because it requires a 1:1 correspondence between the libraries of EAGLE and LTSpice.

Please let me know if there's anything else I can do for you.

Best Regards,


Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 14 of 35
clamm2NFTR
in reply to: jorge_garcia2

Thanks Jorge.
It'd really be best (for me anyway) to just instead get the all-Windows Eagle 8/LTS XVII working but I can't get that working either, please see the post right before the one about Linux. I think I installed everything right but am getting an error that the eagle-ltspice directory is missing during the Export Setup phase.
If that doesn't work then Linux would be my next choice-but since LTSPICE is being emulated via Wine it's probably not going to perform as well.
Message 15 of 35
jorge_garcia2
in reply to: clamm2NFTR

Hi clamm2NFTR,

I understand, the first thing we should is verify that everything is setup using a known good design. In the examples folder there is an ltspice folder, in it open 3518.sch.

Go to the LTSpice button and select Export Setup. Hopefully everything goes smoothly. If it does then click the LTSpice button and Export the whole design. If LTSpice opens then we can confirm that everything is properly setup.

At this point to work with arbitrary designs you have to worry about library correspondence. All of that is covered in our LTSpice webinar which I've linked to here:
https://www.youtube.com/watch?v=b8NOn9CI9vs

Please let me know if there's anything else I can do for you.

Best Regards,


Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 16 of 35
clamm2NFTR
in reply to: jorge_garcia2

Hi there!

 

Thanks again for the reply. I still get the error message while doing the setup export (see attached screenshot), but the 3518 simulation does open correctly.

 

So I will ignore the message in the screenshot going forward and work on the library correspondence.  

 

I greatly appreciate your quick responses and your help w/ this.

 

--Charlie

Message 17 of 35
lomesh
in reply to: jorge_garcia2

Hello Jorge,

 

I hope you're having a a great time.

 

I'm using LTSpice XVII and Eagle 8.5.0. As you mentioned I downloaded the files from github. I copied the folders as suggested. I opened eagle and clicked LTC SPICE and same error continues (LTspiceIV scad3.exe not found). I'm suspecting that there should be something done after copying the files which I'm missing. Could you please help me with the next step?

 

Thank you.

 

Best regards,

Lomesh

 

Message 18 of 35
rachaelATWH4
in reply to: lomesh


@lomesh wrote:

 

 

I'm using LTSpice XVII and Eagle 8.5.0.


 

Is there a particular reason you are doing this? As of v8.4.0 there is a SPICE engine built directly into EAGLE. I'm not sure it's covering 100% of the features of SPICE available in the ngspice engine yet but it seems to work well. Maybe this would be a better option?

 

Best Regards,


Rachael

Message 19 of 35
lomesh
in reply to: rachaelATWH4

Thanks for the response Rachael,

 

There is no particular reason in using Eagle 8.5.0. I was not aware of this situation that I have to do some additional setup.

 

Do I still need to do any additional setup to link use LTspice with eagle 8.4.0?

 

Regards,

 

Lomesh

 

 

Message 20 of 35
rachaelATWH4
in reply to: lomesh


@lomesh wrote:

 

There is no particular reason in using Eagle 8.5.0. I was not aware of this situation that I have to do some additional setup.

 

Do I still need to do any additional setup to link use LTspice with eagle 8.4.0? 


Hello,

 

I didn't mean why are you using EAGLE 8.5.0, I meant why are you using LTSpice? Since EAGLE 8.4.0, there has been a native SPICE simulation engine built directly into EAGLE so there is no need to use LTSpice now. Just draw your schematics in EAGLE, assign models to the parts and run the SPICE simulation engine directly in EAGLE.

 

See the following videos on the Autodesk YouTube channel for more details of how to use this capability:

 

https://www.youtube.com/watch?v=JtytRPefUxk&list=PL1rOC5j_Fyi46HXbWw8QFAtEWRJ-hfpBa

 

The whole LTSpice with EAGLE thing was always an awful kludge to try and shoehorn simulation capability into the EAGLE workflow. Since Autodesk have been investing so heavily in EAGLE, one of the huge new features was this SPICE integration directly within EAGLE.

 

Best Regards,


Rachael

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