[Falcon50SS]

I have looked in the help section of Bobcad and can't find anything related to the error I am getting, "open and self-intersection chain". I receive this whenever I try to extrude or cut through a drawing. I assume that the image has either doubled lines of gaps, but how can I find them?
I have run the utilities under organize [ erase doubles, and cleanup / optimize ], and nothing happens, or changes. I will add the file for someone her to review, and maybe someone can tell me how I can fix it. I tried to load a BobCad file, but that isn't allowed, so its a DXF. I don't know if that matters.

Help,

Bill

[BurrMan]

Here's a quick cleanup and extrude of the entities.

https://youtu.be/Za_x4fBP9yE

I suppose a crash could be more version specific? Maybe some more info about your particulars... This is V27....

BTW: If you need to attach your bbcd file, right click it and choose send-to Compressed zip.

[Falcon50SS]

Thanks for the quick reply! I will try and repeat what you have done, but I swear I've done just what you did except for the extrude a curve. I still can't get a line to highlight completely using the space bar.
P.S. I am using V27 too.
Thanks, Bill

[Falcon50SS]

Ok found my newbie mistake. I was using the space bar instead of the shift key. Thanks,

[BurrMan]

Sure. And for any following......

Spacebar a shortcut for "OK"..........

[Rotax91]

^ thanks for this tip on the spacebar.