Some parts of model disappear after slicing on cura v5.7.0 and the latest

[Marwan 0]

on cura v4.13.1 Everything is okay after slicing

on cura v5.7.0 and the latest Some parts of model disappear after slicing

 

 Does anyone have any idea what could be causing these on the latest versions ?

[ahoeben 1,968]

Here's a good article: https://github.com/Ghostkeeper/SettingsGuide/blob/master/resources/articles/troubleshooting/missing_parts.md

 

Either the missing parts are too thin (and you had settings enabled in 4.13 to compensate for that, most notably 'Print thin lines'), or the model is "non-manifold", and you had settings enabled in 4.13 to compensate for that.

[Marwan 0]

Thank you for replying
I compared it between the two versions and found additional settings in the walls, where it was 39 mm, so I changed it.
Now everything is OK