Cura added an extra fill where it was not required! Why? and How do I remove it?

[Tus3D 1]

New to 3d printing and Cura. I was trying out designing something by myself.  A cable organiser for my Cisco headphone.
I designed in Sketchup and sliced in Cura 4.8.0.

The STL opened alright and seemed to slice ok in Cura. I did not notice earlier that it actually added a whole addition fill in the centre of the cylinder when it sliced, until I was nearly finishing printing.

 

How and why did Cura do that? And how do I prevent it?
I tried disabling support but it did not remove the extra fill. 



 

[Tus3D 1]

I have figured it out. The problem started in Sketchup.
I needed to delete a wall in between the vertical cylinder and the horizontal level in the design.
Then when I sliced in cura, it came out correct. 😁

We can close this one. If anyone has any queries, I am happy to explain further.

[ETA_Boeckle 0]

Happy tu see you could solve your issue!

Sketchup is easy to use and easy to eccess, but unfortunately there are very often problems with STL exported from this software.

 

If you have some time to dive into CAD I would advise you to try FreeCAD or Fusion360 (There is a free option for hobbyist)

Or if you are familiar with programming you could try https://www.openscad.org/