Cura 4.4.0 not slicing design

[ngwpower18 0]

I am running Cura 4.4.0 on a A5s Auruao 3D printer, Designed in SketchUp 2017. 

It slices the STL file and forgets to fill in the walls, and top. 

Removed Cura 4.4.0 and reinstalled 4.3.0. Now the walls are finished at the top of print. 

Included a picture of 4.4.0 after a print of project, upside down using Tree support, it never printed the upper layers.

 

Is this my error or is it a bug in the version. PS reaaly appreciate the advances in Cura. 

[flg01 0]

Same situation, a stl generated from Sketchup 2017. It looks fine in prepare view and incomplete in preview after slicing.

 

[Smithy 1,144]

Sketchup is known not to generate correct STL files for 3D printing.
You can try to repair the file with an online tool like Netfabb, but in the long run it is recommended to switch to another program.

[gr5 2,181]

Some people swear by sketchup and 3d printing but they all know everything in this article.  I suspect you only need to worry about the "reverse faces" discussion.  Please at least skim this article quickly if you must use sketchup:

 

https://i.materialise.com/blog/3d-printing-with-sketchup/