If two objects are intersecting each other and i need only the non intersection parts
I also attempted the merge option while in assembly. "Component > Advanced Utils > Merge". This gave me better results, but simply merges one part with another, and there are another part make cope the model and make it independent parts after delete the solid model and the make it solidify it will get the same result and the last way to save it stp file after get it on the same file you need it .
Watch this video it is useful to you.