Solidworks 2024 Registration Problem

Hi everyone,

I'm having a recurring issue with SolidWorks 2024 on Windows 11.
The program suddenly crashes every time I try to save or " Save As " an assembly or part, or even during the auto-save process.

The message that usually appears before the crash is:

" Unknown error accessing [path]\nom_fichier. SLDASM »

After that, SolidWorks crashes with errors like sldworks:0000746e or sldmodu:00fb0802.

When this happens, any parts or subassemblies that could not be saved remain visible in the graphics area, but they disappear from the FeatureManager tree, as if the assembly had lost references even though the geometry is still displayed.

The strange thing is that when I reopen SolidWorks, the file mentioned in the message usually opens without problems, showing the last version that was successfully backed up.
But if I try to save a new version or overwrite it, that same part or assembly becomes a 0KB file, and the error repeats.

So far, I've tried to back up locally instead of on Google Drive, but it's still the same behavior.

I've never had any problems before starting a project directly in SolidWorks. I usually keep all virtual components until the manufacturing documents are needed, and this workflow has always been stable.

Recently, I started experimenting with Treehouse, which I really liked for planning the structure of the assembly ahead of time. I use a top-down design approach, with a skeleton piece inserted into the main assembly (and into each subassembly) that defines all the basic geometry, planes, and overall equations.

I wonder if the problem could be related to this new workflow or the way references are handled between virtual and external parts.

Has anyone encountered something similar or found a reliable solution?

Thank you in advance for any help. This problem is really blocking my work.