Solution exception:Attempted to divide by zero error

grasshopper ladybug
1

Hello,

Just wondering if anyone knows how to solve this? I can see there are more than one unsolved threads on it, but does anyone have an update on how to get around it?

Screen Shot 2021-09-17 at 12.47.20 AM
Screen Shot 2021-09-17 at 12.47.20 AM1638Ɨ1166 109 KB

thanks!

2

Hi @markbrit ,

It looks like you managed to create geometry that has an invalid zero-area mesh face. Iā€™d say that this is a bug on the LBT end and we should be catching geometries like this.

Can you upload a file that contains your geometry so that we can recreate the issue on our end?

Once I have that, I can implement a fix that ensures that the whole process doesnā€™t halt because of an invalid geometry like this.

3

I just merged a fix that I think should probably solve this issue:

You can get it on your end with the LB Versioner in an hour or so and Iā€™ll test it if you upload your geometry.

4

Thanks for the quick reply!
File here:
https://drive.google.com/file/d/1oON3kFIcnaOHhdC8XzGbqTUqZ6HhqN8j/view?usp=sharing

Thanks!

5

I donā€™t have a powerful enough laptop to test that geometry, @markbrit (the file maxed out my memory). But Iā€™m 99.9% sure that the change that I merged fixed the issue. If youā€™re able to run the LB Versioner, restart Rhino, and then test your file, that would be a big help.

6

Hi Chris,

Have updated and rerun, errors still there but are different obviously now.
I have tried the same geometry as entirely a mesh input into the script and get this error now.

Screen Shot 2021-09-19 at 1.23.58 PM
Screen Shot 2021-09-19 at 1.23.58 PM1854Ɨ898 92.7 KB

The entirely brep model also throws an error.

Perhaps I just have a piece of geometry that isnā€™t compatible, although it is fairly simple in form?

Screen Shot 2021-09-13 at 8.19.33 PM
Screen Shot 2021-09-13 at 8.19.33 PM1920Ɨ1061 75.1 KB

thanks!

7

Hi @markbrit ,

That error is pretty clearly because you have connected a Null up to the _geometry. Maybe use the native Grasshopper Clean Tree component to get rid of the Nulls.

8

Hi @markbrit @chris
I have the same error. Have you solved it?

Capture3
Capture31899Ɨ892 184 KB

9

Your problem looks different, @tsau . I donā€™t know what your analysis period HOYs are there but maybe you are accidentally filtering out all hours from your sky matrix. Try disconnecting it.
That also seems like a really coarse grid size for a model in meters.

10

Thank you, @chris. I tried and got the same result
ERROR.gh (38.0 KB)

error
error1909Ɨ1006 397 KB

11

Hi @tsau ,

I donā€™t have any issue running your file on my machine:

image
image1784Ɨ695 158 KB

This leads me to believe there are only a couple of possible explanations. Can you let us know the following:

  1. What is the version of Radiance that you see coming out of the HB Check Versions component?

    image
    image897Ɨ296 17.3 KB

  2. Are you on Mac or Windows operating system?

12

Hi @chris,
you are right! I installed the version you show and all works
That was my version.

Capture
Capture737Ɨ226 16.9 KB

It looks like I have to update openstudio and E+ too. Isn`t it?
Thanks a lot for your help!

13

Thanks for checking that @tsau . The plugin is still supposed to work with that version of Radiance so Iā€™ll try to recreate it and see if I can fix the issue when I get the chance.

1 Like
14

Thanks, again, for checking this, @tsau . You can see that I pushed a change that will give a clearer error message for this case going forward:

1 Like