I Can’t Union “Part type not supported in CSG”?

[mohamedn88880 (MohKaboom)]

Recently, I was trying to union some unions and parts but I surprised with a massaged pop up says:

Here is my explorer:

I hope these details are enough.

I have been searching for a solution, but I didn’t get what I was looking for.

Why doesn’t it allow to union unions?

[topdog_alpha]

That error occurs when you try to union a meshpart, model or other studio object with a part. Check the parts that you are trying to union to ensure that they are only blocks, wedges, spheres and cylinders