Order of objects in collections

[robertsUMD]

Hi,

I'm having an issue with a model that uses a discrete user parameter.  It is a bass guitar that can be either 4, 5, or 6 strings, so there's no way to continuously change the parameter.

The issue is that some features seem to change drastically when I change this parameter.  For example, if I delete faces, which faces get deleted can change based on the parameter.  Or paths used for lofts or patches get messed up.

It looks like the features are likely referencing objects by index, and where those objects are in the collection is changing for some reason.  I know that position isn't guaranteed. but I'm not sure how to work around this.

All that changes is some dimensions.  It's not like I add new bodies or components when I change the number of strings.

I can kind of work around this by using configurations, but it's kind of a pain.  Once I branch at a feature everything downstream is affected.

Any pro tips?

Thanks in advance,

Doug Roberts

[robertsUMD]

Here's a video showing an example of this happening when trying to delete faces.

[CGBenner]

@robertsUMD 

Welcome to the Community, Doug.

I've moved your post here to the Design forum to increase visibility with the experts.  Hopefully someone will have some advice for you.  Good luck!

[jhackney1972]

To better figure out what is going on, you need to attach your model giving you these issues.  If you do not know how to attach your Fusion 360 model follow these easy steps. Open the model in Fusion 360, select the File menu, then Export and save as a F3D or F3Z file to your hard drive. Then use the Attachments section, of a forum post, to attach it. If needed, ZIP a F3Z file.

[CGBenner]

@robertsUMD 

Hello, do you still need help with this question?

[robertsUMD]

I might be good for the moment, but I'm sill a bit confused.  I was getting rid of newer components that were in progress before posting the file.  The issue was with something that was with a component that was really done and shouldn't have been affected by the new work.  But in the process, the problem went away.  I guess any kind or error might corrupt the arrays?