Importing step model - invisible part

Hi,

can somebody help me with importing step model into SolidWorks?

It is plastic enclosure with four parts. Base, cover, panel and hook. The problem is, the base is invisible after import. We have Solidworks 2018 SP5.0. I try open the step file in DesignSpark, SolidEdge, Inventor and imported casing was always OK. Just Solidworks has some kind of problem with base of the casing.

I also try to change setting for step import, but no luck. Base is always invisible.

Does anyone has any idea what could be wrong? 

Thanks.

Michal.

SolidworksImport/export