topic Re: Opening files causing Fusion to stop responding in Fusion Support Forum

Opening files causing Fusion to stop responding

petersgrey1 — Fri, 16 May 2025 06:51:04 GMT

I am a hobbyist who has been using Fusion 360 for Personal Use for a couple of years.

For the last few days, I have been experiencing major drama when trying to open some files. The program hangs and reports "not responding". Even if I leave the program to run its course, there is still no response after 30 - 40 minutes.

I thought that my laptop's 16GB of RAM might be the cause, so I have now installed 64GB. The problem persists.

I have uninstalled/reinstalled Fusion 360. The problem persists.

I have ensured that no other programs are running (except AVG security).

I have checked my upload and download speeds. Around 25 Mbps up and 45-55 Mbps down.

Initially I thought that the files may have become too big (with many sketches and bodies) but I am also experiencing this issue with new, small files which I have just created.

I can open older files, albeit slower than I could with only 16GB of RAM.

Attempting to clone a body using Move/Copy causes the program to not respond.

Attempting to import a body or sketch using Insert>Derive causes the program to not respond.

Attempting to save a file often causes the program to not respond.

All in all, this is most frustrating and is beginning to make Fusion 360 almost unusable.

I really hope that someone can give me an idea of what I am doing wrong or what can eliminate these issues.

Thanks in advance, Peter

Re: Opening files causing Fusion to stop responding

jeff_strater — Fri, 16 May 2025 21:23:55 GMT

would you be willing to share one of these designs here? We could at least see whether the problem is localized to your computer or is more systemic to Fusion itself. Thanks

Re: Opening files causing Fusion to stop responding

petersgrey1 — Sat, 17 May 2025 03:54:09 GMT

Hi Jeff,

I have no problem with sharing a design, except that I don't know how to do that if I cannot open the design to export it.

Re: Opening files causing Fusion to stop responding

petersgrey1 — Sat, 17 May 2025 04:05:43 GMT

Hi again Jeff,

will this link allow you to check? https://a360.co/43keKj4

Re: Opening files causing Fusion to stop responding

petersgrey1 — Sat, 17 May 2025 04:24:58 GMT

Hi Jeff,

I tried attaching a Fusion Archive, but it is larger than the 71md limit.

Re: Opening files causing Fusion to stop responding

jeff_strater — Sat, 17 May 2025 21:14:20 GMT

That link did not resolve for me. It did resolve enough for me to see the title: "Ferrari 321P chassis". That sounds like it could be quite large, depending on how detailed it is. If the design is bigger than 71MB, it might be that the file is just big and will take some time to open. Can you provide some insight on what is in this design? Did you create it yourself, using Fusion modeling tools, or did you download it from somewhere? Is the chassis a BRep, or might it be mesh data?

If you have something like Google Drive or other file hosting service available where you can place the design, we can share it that way.

Re: Opening files causing Fusion to stop responding

petersgrey1 — Sun, 18 May 2025 00:06:21 GMT

Hi Jeff,

Here is a link to this file in my DropBox. This file is 285mb https://www.dropbox.com/scl/fi/qkn4jdpdwml1neaunzqrw/Ferrari-312P-chassis.f3z?rlkey=t7701zth9fhvzeug9jqzrhwei&dl=0

This is a link to a smaller (77.5mb) file which also will not open (not responding). This file has not many bodies and sketches. https://www.dropbox.com/scl/fi/b4isk09vypfr7c4i6crly/612P-ff-050-pod.f3d?rlkey=kf8302e11488eet7f8ucssjn3&dl=0

I really appreciate your help,
Peter

Re: Opening files causing Fusion to stop responding

petersgrey1 — Sun, 18 May 2025 01:07:39 GMT

Hi Jeff,

Firstly, thanks for persevering with my issue.

Yes, the "Ferrari 321P chassis" file is big - 285mb. It is a slot car design. I drew the body using "Forms" and the other parts were designed in the "Solid" space. I think that means that the chassis is BRep (I'm not sure on that terminology). But there are no mesh parts in this file.

I also sent the link to a smaller file which has only a few bodies and sketches but still, for some reason, comes in at 77.5mb. This file also causes Fusion to not respond. This one is wierd though, because yesterday it did open once but subsequently actually caused my computer to shut down when I tried to re-open it. I had made no changes to the design while it had been open.

There is some derived commonality within the files which are causing these issues, so I'm wondering if there is some kind of corruption that has been spread by the "insert>derive" process.

Thanks again,

Peter

Re: Opening files causing Fusion to stop responding

jeff_strater — Sun, 18 May 2025 23:34:24 GMT

Thank you for sharing the designs. I can reproduce the hang with the smaller design (I did not even try the larger one - I'll take your word on that one). I've filed a high-priority bug FUS-200903 to track this issue. Hopefully a quick fix can be implemented that will allow you to continue working on your designs. I apologize for the inconvenience - it's not good when you cannot access your designs.

Re: Opening files causing Fusion to stop responding

petersgrey1 — Mon, 19 May 2025 10:36:29 GMT

Thank you Jeff,

I'll await your further news/update.

Peter

Re: Opening files causing Fusion to stop responding

jeff_strater — Tue, 20 May 2025 00:42:53 GMT

The engineering team is still investigating the "612P+ff-050+pod.f3d" file. But, they tested (and I also verified) that the large file (Ferrari+312P+chassis.f3z) does open correctly:

Can you try again to see whether you can open this, and if the result looks like what is shown above? Thanks.

Re: Opening files causing Fusion to stop responding

petersgrey1 — Tue, 20 May 2025 06:35:12 GMT

Hi Jeff,

I tried to open the Ferrari+312P+chassis file.
After 7 minutes of the spinning blue wheel, I got this message
"Corrupt File

The file you are trying to open or operate is corrupt! the current operation will be aborted. File name: Ferrari chassis v19"
Weird that it opened for you.

Cheers, Peter

Re: Opening files causing Fusion to stop responding

jeff_strater — Wed, 21 May 2025 02:57:00 GMT

just as a test, try uploading the exported file you shared with me for the Ferrari chassis. Can you open that version? Thanks.

Re: Opening files causing Fusion to stop responding

petersgrey1 — Sat, 24 May 2025 03:07:46 GMT

Sorry for the late reply.

Yes, this file opened for me. Opening was quite slow. It took about 4-5 minutes with the program showing "not responding" twice during that process.

Again, this is weird because the design which I exported didn't open (and still doesn't) as I noted in my (message 12) reply.

Cheers, Peter

Re: Opening files causing Fusion to stop responding

petersgrey1 — Tue, 03 Jun 2025 11:25:50 GMT

Hi Jeff,

Has there been any progress?

I am again striking the problem of being, effectively, locked out of some more designs. I have tried exporting an archive file, uploading it and trying to open it. I still got the "corrupt file" message.

The main (most important) file has a notation "Unrecoverable exit code from extractor: -1073741831" in the web hub overview.

Can anything be done? Or have I lost three days' work?

Re: Opening files causing Fusion to stop responding

jeff_strater — Thu, 05 Jun 2025 22:30:03 GMT

The issue with the "612P+ff-050+pod.f3d" file is still being investigated. They are not sure what is wrong with it, other than it is reporting, internally, that it thinks it has 3 million features in it (it is not clear to me, from the bug comments if those are timeline entries, or "direct modeling" features. I suspect the latter). Obviously this is not true. That's all the news I have so far, sorry