Intentional holes not printing

[TrevTastic 1]

I have no clue whats wrong with my print, but no matter what I do it keeps coming out wrong!

 

So im trying to print out a simple hollow tube however when I slice the model it automatically fills it in. I have tried turning on and off multiple settings but none of it seems to give me my desired result. Can anyone spot any issues?

splinttest.stl

[Andrew_W 8]

It appears as though the model you used has issues. I downloaded it and had the same outcome,  I then opened it with 3D paint and saved it as a glb file and it seems to work OK?

 

[ahoeben 1,968]

It seems that the model normals are throwing off Cura. The inner wall normals are reversed in relation to the outer wall normals.

[TrevTastic 1]

3 hours ago, ahoeben said:

It seems that the model normals are throwing off Cura. The inner wall normals are reversed in relation to the outer wall normals.

It was the model's normals that were broken! I fixed the normals and tried re-printing it and it all worked out. Thank you!