Description of the bug

Hello!

On several occasions, I encountered an issue when trying to slice an STL file. I saw on some forums that switching the slicer engine from "Arachne" to "Classic" could solve the issue.

At the time, I tried that, and I was able to slice the file without any problems, but now the same issue occurs using both the Classic and Arachne engines.

The specific problem is the pop-up error: "Flow::spacing() produced negative spacing. Did you set some extrusion width too small?"

Sometimes, removing or adding top layers would allow me to slice, but in other cases, there's no way to fix it, and the same error keeps showing.

My Prusa Slicer version:

PrusaSlicer Version: 2.6.1+win64
Build: PrusaSlicer-2.6.1+win64-202309060711

Operating System: Windows
System Architecture: 64 bit
Windows Version: Windows 10 (build 19045), 64-bit edition
Total RAM size [MB]: 16,425MB

OpenGL installation
GL version: 4.6.0
Profile: Core
Vendor: ATI Technologies Inc.
Renderer: AMD Radeon(TM) Graphics
GLSL version: 4.60.0

Project file & How to reproduce

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.6.1+win64

Operating system

Windows 10 (build 19045), 64-bit edition

Printer model

ARTILLERY GENIUS PRO/X2