Hi Anis, yes there appears to be some trimming curve problems in 3 of the small surfaces in the object.

If you export to a polygon format, the polygon mesh will have some errors in those areas, but they are so tiny you won't see them unless you zoom in super close to that particular spot on the model inside of one of those tiny grooves.

But when importing the Solids information, it looks like SolidWorks is more sensitive to those errors and will leave out the larger surfaces adjacent to the areas with trim curve problems as well.

So you will get a better render result in this particular case if you export to a mesh format like .obj instead.

- Michael