topic FATAL ERROR: Schema Migration occurring without Schema Version Change??? in Inventor Forum

FATAL ERROR: Schema Migration occurring without Schema Version Change???

phlyx — Thu, 29 Aug 2024 20:04:09 GMT

We're running Inventor 2024 without Vault. We have a project we wanted to duplicate so we Pack & Go'ed it to another folder keeping the paths. Then tried to use Design Assistant to rename the parts and assemblies but got a message that all the files need to be migrated to the current version. So then used Task Scheduler and migrated all files to the current version. Then went back to Design Assistant and renamed all the files (there are a LOT of files). When that got done everything looked good..... until I tried to open it. Then I got FATAL ERROR: Schema Migration occurring without Schema Version Change a couple times.

Looked online and saw everything from it was the antivirus software to just start over. So I got the idea to Pack & Go the new file to see if it would clean things up. Nope, the Pack & Go copy gave the same error. Soooo, how do I recover this or how is a better way to do that?

Re: FATAL ERROR: Schema Migration occurring without Schema Version Change???

johnsonshiue — Thu, 29 Aug 2024 21:14:24 GMT

Hi! I suspect some files, if not all files, may have been corrupted due to certain operation or interruption. If you use Vault, you may want to get the prior versions. Or you may find the last saved copies in the \OldVersions\ folder.

Many thanks!

Re: FATAL ERROR: Schema Migration occurring without Schema Version Change???

phlyx — Fri, 30 Aug 2024 12:56:00 GMT

Hey @johnsonshiue, thanks for the info but we do not use Vault. I was about to delete all the files and then I decided to try opening each sub-assembly individually and found one assembly that gave me that error. Then I opened the components under it and found a weldment bracket caused the error. Re-Pack & Go'ed that, renamed it, copied it over to the new project and TAH-DAH! all is well now! Whew. Saved me a ton of work.

Re: FATAL ERROR: Schema Migration occurring without Schema Version Change???

matias_pikkarainenH5266 — Mon, 17 Nov 2025 11:56:37 GMT

I have a similar kind of error, but a hint different. So far, I have tested this with one Windows 11 24H2 device and one Windows 10 22H2 device and only the Windows 11 one produces the error >> needs more test devices as this might not have anything to do with Windows 11 24H2 (but it might...). See the attached image.

FATAL ERROR: Schema Migration occurring without Schema Version change. Migrating: SMxGroupNode

Re: FATAL ERROR: Schema Migration occurring without Schema Version Change???

matias_pikkarainenH5266 — Mon, 17 Nov 2025 11:54:47 GMT

Re: FATAL ERROR: Schema Migration occurring without Schema Version Change???

dan_inv09 — Mon, 17 Nov 2025 14:58:13 GMT

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/FATAL-ERROR-Schema-Migration-occurring-without-Schema-Version-change-Migrating-SMxGroupNode-when-opening-files-in-Inventor.html

Personally I would check the "No" box at the bottom - How is the data corrupted? How does it get corrupted? Defragging my SSD isn't going to help anything, I've got 128 gigs of system memory, ... well then, it must be malware, the IT department installed a pirated version (that I watched them download from autodesk.com)! So no, the article wasn't helpful.

I don't know if it would help either but maybe someone out there (@johnsonshiue?) could explain: "the number of objects found in the segment does not match the segment summary"

Re: FATAL ERROR: Schema Migration occurring without Schema Version Change???

johnsonshiue — Mon, 17 Nov 2025 23:03:03 GMT

Hi! This is absolutely a corruption issue. If possible, please share the file with me directly at johnson.shiue@autodesk.com. I can use our internal debug tool to see if the corrupted file can be repaired.

Many thanks!