Hello everyone, this problem has been hounding me for a few days, ever since hotfix 2.5 dropped.

For the past 3 months I've exported assemblies to GLB (some with motion studies/animation included) and everything was working fine, even with underdefined assemblies or slightly unresolved mates in the animation - like multiple parts moving at the same time with many different types of mates. Then it came to my attention the export option was changed from "export" to "save as" in SP2, but now as of hotfix 2.5 .GLB doesn't work for me whatsoever, .GLTF I've it got to work maybe 2 times since then but it was with two simple assemblies I made to test it, for example:

This worked (in GLTF), notice the chamfers and fillets, if I tried the same with just a cube it wouldn't work.

Things I tried:

1 - Saving assemblies as GLB or GLTF, with or without motion/study (turned on and off options like camera,scene,lighting, etc);
2 - Tried exporting with extreme low poly count and mid-high poly count;
3 - Tested different assemblies, different number of parts, fully defined or underdefined;
4 - reinstalled solidworks connected;
5 - Tried the Khronos org online GLB/GLTF validator;

What I found: GLBs are utterly broken for me and do not work anymore, GLTF rarely worked, I don't understand what is wrong but it probably has something to do with this 

"mimeType": "model/gltf-binary", 
"validatorVersion": "2.0.0-dev.3.10",
"validatedAt": "2025-05-08T13:15:07.400Z", 

"issues": { "numErrors": 36, "numWarnings": 0, "numInfos": 0, "numHints": 0, "messages": [ { "code": "ACCESSOR_TOO_LONG", "message": "Accessor (offset: 8097972, length: 4) does not fit referenced bufferView [78] length 1156.", "severity": 0, "pointer": "/accessors/93/byteOffset" },

funny thing is the validator accused many different errors of higher severity in older GLBs that worked but none had to do with "accessor" like now.

Can anyone test .GLB export or replicate this problem?