Fillet radius chain

[peterm]

I have just recently upgraded to AutoCAD 2018 and have found that the fillet radius chain option causes a fatal error when I try to apply it to a solid edge.

Has anyone else encountered this?

[Alfred.NESWADBA]

Hi,

>> I have just recently upgraded to AutoCAD 2018

Please make sure you have installed the latest service pack, starting command _ABOUT should show you AutoCAD 2018 Update 1.1

Next create a new drawing, one box and try the same command again ... if that works it's a drawing specific issue. So open your drawing, run command _AUDIT and let AutoCAD scan the file for errors (and repair them). In case this did not solve the problem please upload the drawing with the description where exactly you did try command _FILLET + the radius you used.

- alfred -

[peterm]

Hi Alfred,

Thanks for the reply.

It seems to be working in a new drawing and an audit on the original drawing found no errors.

I got round it by reverting to AutoCAD 2011.

I'll let you know if it happens again.

[peterm]

Hi Alfred,

It's doing it again with another model.

On the attached test model try adding a 10mm radius round the top edge and then round the bottom edge.

[Alfred.NESWADBA]

Hi,

how did you create that object?

I can reproduce some issues with that, e.g. that _FILLET can show the preview, but then does not execute the fillet with radius 10.

Also running _BREP and then try to move the top face upwards crashes AutoCAD, so let's see how you created that object.

Also please show us the screenshot from command _ABOUT.

- alfred -

[peterm]

Hi Alfred,

I created a basic solid box and then added a 10mm fillet radius to the corners.

Here's the version of AutoCAD:

[Alfred.NESWADBA]

Hi,

>> I created a basic solid box and then added a 10mm fillet radius to the corners

I tried this with Vanilla AutoCAD 2018 Update 1.1 (I don't have mechanical) and can't reproduce this issue.

So when you start a new drawing with that workflow you always crash?

Can you try to start with Vanilla profile and try the same steps again?

- alfred -

[peterm]

Hi Alfred,

I'm using the vanilla version of AutoCAD that comes with Mechanical.

I've just narrowed down the problem.

It only happens when I start with a template drawing created in AutoCAD 2011.

Even if I then open and save the template in AutoCAD 2018, the problem persists.

The only solution would be to recreate all my templates from scratch, which would be a lot of tedious work.

[Alfred.NESWADBA]

Hi,

>> I've just narrowed down the problem.

>> It only happens when I start with a template drawing created in AutoCAD 2011.

Great catch!

>> The only solution would be to recreate all my templates

>> from scratch, which would be a lot of tedious work.

Are these templates based on Mechanical or based on Vanilla?

If second ... can you upload a template so I'm able to try/play with the issue, maybe I can find a setting.

- alfred -

[peterm]

Hi Alfred,

The templates are created in Vanilla AutoCAD.

I've just created a new blank template in 2011 (attached).

Then I've used it to create a new drawing in 2018 and the same problem occurs.

[Alfred.NESWADBA]

Hi,

>> I've just created a new blank template in 2011 (attached).

>> Then I've used it to create a new drawing in 2018 and the same problem occurs.

I used your template to create a box, then used command _FILLET to fillet the vertical edges.

Next step is to again start command _FILLET, select one of the upper edges, then set the same radius, then option "_CHAIN" and pick again the same edge. ==> result is ok, however the preview of the chainage is different and that could really be the difference.

I would start with:

• Create a new drawing from your 2011-template
• create a new drawing from and AutoCAD 2018 template
• With both drawings start command _SYSVDLG (from the express tools) ==> save your sysvars to a CSV so you have 2 CSV's (for each dwg-file one CSV)
• compare them with Excel to see differences

HTH, - alfred -

[peterm]

Found it!

In AutoCAD 2011 I had SOLIDHIST set to 1.

If I set it to 0 then there's no problem adding the radius.

Obviously there is some sort of incompatibility between the two versions of AutoCAD with regard to solid history.

[peterm]

Actually, it has nothing to do with AutoCAD 2011.

Start a new blank drawing in AutoCAD 2018. Set SOLIDHIST = 1. Draw a solid box. Radius the corners. Add a chain radius round the top edge. Add a chain radius round the bottom edge. CRASH!