Odd error. NEED HELP!

[rethmonk 0]

Greetings,

I've been printing with the Anet A8 Reprap Prusa I3 for a couple weeks now. So far so good. until tonight.

Here is a still of the model im printing as shown in Cura-

-notice the large open space circled in red. But wait, during printing somehow a random wall was added-

-notice how now the opening has been covered by a layer witch does not exist in cura. ( the blob in the corner is from the resulting catastrophic failure.

Any help would be greatly appreciated! Thank you in advance!

[DaHai8 70]

Try running the .stl through MakePrintable or some other 3D Print Mesh repair site/application.

Those type of issues are usually caused by an invalid Mesh (not a closed Manifold) which confuses Cura, and other slicers, as to what's the 'inside' and 'outside' of an object.