Unable to Import Model Error for this one model only

[CrazyBuffalo]

When I use the "Send to Substance 3D Stager" feature in Substance Painter, I get the "Unable to Import Model" error in Stager.  But it gets weirder than that.

Maybe there's something wrong with the model?  Well I can import the model directly into Stager with no problem.  I can also import the model into a fresh scene of Painter, and then use the "Send to Substance 3D Stager" and it works with no problems.

Just to make sure there wasn't something weird going on with my materials, I deleted every layer in my texture set and replaced them all with standard fill layers.  Nothing special.  It still doesn't send.  So there's nothing wrong with the materials.

I have also exported all the textures from my scene, opened a new Painter scene, imported the model, and re-connected all the textures, and when I send it to Stager after doing that, it works.

It's almost like my working SPP file is bugged and just won't send to Stager.  For the record, I have tons of other working Painter files that send to Stager no problem.  It's just this one.  Any ideas what could be causing it?

[Ares Hovhannesyan]

For testing we need your object file to test. IMHO your idea that it can't link existing material correctly can be a reason.

[Alexandre Becquet]

Hi, agreed with @Ares Hovhannesyan . Did you try to set a completely new project in painter and try send to Stager?

[CrazyBuffalo]

Hey guys, I explained in the post that the issue is not with the model.  I can import the model into an empty scene in Painter and send it to Stager with no issues.  I can also just import it directly into Stager with no issues as well.