3D object disappeared after migration

[Yvonne]

I created an object using slabs/walls etc. The project was migrated and now the object doesn't appear in 3D. I can see still see it in plan. 

The project was started in AC25 and is now in AC26. 

There was an archive file that I opened in AC26 and the object is showing fine there. I tried to copy it across but no luck.  I have no idea what's gone wrong...

[Yvonne]

Is this what you mean by parameter list?

It doesn't generate in 3D so I can't adjust any of the parameters 

[Lingwisyer]

Do you actually have a fill with the index 31000? Try manually setting the fills, then place a new instance of the object.

[Yvonne]

I tried manually setting the fills and changing the fill with index 31000 to something else. Still nothing in 3D.

in the object setting: 

In the 3D Script....... does this mean its not fixable? 

[Lingwisyer]

You will probably need someone to look at it directly if you want to fix it. I cannot do that. Other than that, you rebuild the object from scratch.

Ling.