# non-manifold error

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How to Fix Broken STL Files Before 3D Printing: 7 Common Errors and Fixes

How to fix broken STL files before 3D printing: non-manifold edges, holes, flipped normals, thin walls, wrong units. Guide for Meshmixer, Blender, 3D Builder, PrusaSlicer.

3D Printing Technology • 21-10-2026