Problem creating cavities inside a mold

Good day all!

I had a problem while creating cavities  inside a mold. I succeed to do the cavity of the nominal  part and the riser but  when I tried to do it for the gating  system and the collar, solidworks said that it generated a problem in the geometry.
I enclosed the zip of the components

Any help would be highly appreciated !

Thank you

Best Regards!

SolidworksParts And Features