topic Re: calling InvokeLisp from palette is crashing in .NET Forum

calling InvokeLisp from palette is crashing

JamesMaeding — Mon, 20 Apr 2015 20:07:21 GMT

I have a palette with a button to run a lisp that draws a bunch of circles.

The lisp is run with T Tanzillos InvokeLisp, and runs fine from other situations.

I am wondering, normally I lock the document when running stuff (synchronously) from a modelss dialog.

When I use a lisp though, there is no document locking mechanism.

I am doing this in my button callback:

Autodesk.AutoCAD.Internal.Utils.PostCommandPrompt();
                    ResultBuffer ret = HALispVars.InvokeLisp(args, ref stat);
                    Autodesk.AutoCAD.Internal.Utils.PostCommandPrompt();

What happens is the first run always works.

The second time I pick the button from the palette, I get an internal error.

Is this something obvious I am missing? (Assume the lisp is not erroring, I checked that).

It seems like it has to be related to focus issues or db access as its only with the palette that I get the issue.

thanks

Re: calling InvokeLisp from palette is crashing

JamesMaeding — Mon, 20 Apr 2015 22:10:55 GMT

I have been testing to see if there is a pattern to the crashing, and there is.

My lisp function draws circles, using entmake.

If I do an "erase" "all" by hand on command line to clear the circles, the next call to draw the circles fails, right at the first (entmake ...) function.

Note that the postcommand I had seems to make no difference, those are irrelevent I think.

So somehow the database is not liking the entmake call, even though it worked seconds earlier.

There must be some issue with the database not being ready for write.

The error is an elock violation. I'll simplify the entmake and see if any dxf codes are making it angry.

Re: calling InvokeLisp from palette is crashing

augusto.goncalves — Fri, 29 May 2015 18:51:26 GMT

the eLockViolation means that you need to lock the database. Or maybe you left it lock from previous call.

when calling from a modeless dialog you'll need to lock or send command to AutoCAD (which will be async)

Re: calling InvokeLisp from palette is crashing

JamesMaeding — Fri, 29 May 2015 20:18:52 GMT

hmm, this was resolved a while back. Locking was indeed the issue and solved it.

I wonder where the posts went I thought were in this thread.

Thx for finishing it out.