# New tutorial: fixing non-manifold models

March 31, 2009

We just published a new [tutorial on fixing non-manifold errors in your models](/content/tutorials/fixing-non-manifold-models/index.html), with lots of examples and videos. Please let us know if there’s anything you think we missed and we’ll add it!

## Comment

I spent several hours yesterday night trying to fix model errors that didn’t show up in Meshlab or Blender, but that didn’t go through Shapeways (mostly inverted normals error). I thought it might be useful to know how I fixed it (I was using ViaCAD Pro). It seemed to be a problem with overlapping solids.

In the end I did a “merge solids” (or “add solids”) for all connected parts, and then it passed all checks. You can see the final model here: [Final Model](/content/model/24386/planetarium.html)