topic Re: Mirrored body treated as different body in Fusion Support Forum

Mirrored body treated as different body

maxhheaven — Tue, 23 Sep 2025 10:26:57 GMT

For some reason I have this issue with 1 mirrored body in my CAD that only happens when I restart fusion (close the program open and change values). For some reason when I change the width of the case (by changing bool SSD or GPU slot width) a mirrored body becomes a different body, (body 66 is now body 67) and causes issues. It only seems to happen when I close the program down and reopen it? If I fix the issue it wont happen until I close fusion 360 and open it again. This only started happening when I added an optional 5mm width increase to the backplate.

I apologise for the poor explanation but I'm not even certain as to what could possibly be happening

https://a360.co/3Iq88sY

Re: Mirrored body treated as different body

davebYYPCU — Tue, 23 Sep 2025 11:39:32 GMT

File reference does not allow download, without the timeline and access to feature settings, there no way to assist you.

Might help.....

Re: Mirrored body treated as different body

maxhheaven — Tue, 23 Sep 2025 11:48:01 GMT

Here is the f3d file

Re: Mirrored body treated as different body

maxhheaven — Tue, 23 Sep 2025 11:49:53 GMT

My bad, I used it recently and I was able to download my files using the link, I have attached the f3d file in a seperate reply

Re: Mirrored body treated as different body

davebYYPCU — Tue, 23 Sep 2025 12:38:42 GMT

Got the file,

Where is body 66? (Found a 69 and 72)

A Change to the bool SSD factor to 2, caused an error and flow on in the Top and Bottom

GPU_width is driven by a count parameter - driven by ??

Late here back tomorrow.

Re: Mirrored body treated as different body

maxhheaven — Tue, 23 Sep 2025 13:04:04 GMT

body 69 is what body 66 used to be a few restarts ago, GPU slot width is a common form of measurement and I convert to mm afterwards for ease of use. If you open the file and look at the body names before the values are changed it should be body 68 and after you change bool SSD to > 1 the body changes to body 69 for some reason.
Bool ssd controls an if statement where if the value is > 0 the offset is set to 5mm, however changing the value from 1 ->2 causes an error?

Re: Mirrored body treated as different body

maxhheaven — Tue, 23 Sep 2025 13:57:14 GMT

I ended up deleting the mirror operation that I think caused the errors and just doing a mirror again and fixing all the downstream issues because of that, I think the mirror operation must not have been working properly since its the same workflow but a different result

Re: Mirrored body treated as different body

davebYYPCU — Wed, 24 Sep 2025 00:55:47 GMT

Yep, changed this to a 2, and the yellow extrude that goes yellow, was in the lower rear corner.

Might help...

Re: Mirrored body treated as different body

maxhheaven — Wed, 24 Sep 2025 01:04:52 GMT

Yeah I already understood that, once you go through and fix the yellow and red warnings (just reselecting the body for references) it works, however even if you save these changes once you close the program and reopen the file the issue happens again, I think the mirror I used to create the geometry that's causing issues somehow stopped working properly, after deleting the mirror and just doing a new mirror that does the exact same thing, It works? Thinking back on it maybe it was the mirror operation (adjust, identical, optimized) that might have been the issue although uncertain, its odd since the mirror I'm talking about doesn't show up with a warning.

Re: Mirrored body treated as different body

davebYYPCU — Wed, 24 Sep 2025 01:22:35 GMT

Adjust, identical, optimized?

Not seen that for Mirror, (it’s either Join or New xxxx)

they are pattern controls, maybe a pattern by count 2? and not that mirror.

Might help….

Re: Mirrored body treated as different body

maxhheaven — Wed, 24 Sep 2025 01:26:29 GMT

Its an option for mirroring features, however its not for bodies so I'm fairly confident that particular mirror was just bugged

Re: Mirrored body treated as different body

davebYYPCU — Wed, 24 Sep 2025 01:32:51 GMT

OK.