ZWCad Debug

[Troller]

I'm having trouble debugging AutoLISP code in ZWCad. In AutoCAD, I can use the VLIDE editor or set the LISPDEBUG variable to trace errors and see where they occur, but ZWCad doesn't seem to support LISPDEBUG (it says the variable doesn't exist). When I type "VLIDE" in the ZWCad command line, it just opens VS Code for editing the .lsp file, which doesn't help with runtime debugging.

Are there any built-in tools or methods in ZWCad for debugging Lisp scripts? For example, how can I get line numbers for errors, trace function calls, or step through code? I've tried loading the file and running it, but the error messages in the command line don't specify the exact location. Any recommendations for external tools or workarounds would be appreciated. Thanks!

[SLW210]

I have moved your thread to the AutoLISP, Visual LISP & DCL Forum.

 

You may need the ZWCAD plug-in for VS Code. https://marketplace.visualstudio.com/items?itemName=Zwsoft.ZwLisp

 

What version of ZWCAD do you use?

[Troller]

Thanks SLW210! I use ZWCad 2026

[Steven P]

Not sure for ZWCad, but if you put checks into the code this can narrow down to where there error is. For example (princ "\nOK to here 1")... and 2, 3, 4 etc will show where the code runs to before an error (often errors are grammatically correct and just not doing what you want). Might help you out till you get another answer