Errors in Mendel STL files

This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
587 [354] [185, 205]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
18.9600000381
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
369 [180] [139, 146]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
19.3600000381
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
596 [363] [128, 191]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
19.7600000381
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
596 [363] [128, 191]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
20.1600000381

This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
626 [341] [189, 260]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
10.45
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
767 [469] [189, 265]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
10.85
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
767 [469] [189, 265]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
11.25
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
647 [363] [63, 84]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
11.65
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
647 [363] [63, 84]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
12.05
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
106 [38] [84, 85]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
12.45
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
106 [38] [84, 85]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
12.85
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
106 [38] [84, 85]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
13.25
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
769 [469] [245, 265]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
13.65
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
769 [469] [245, 265]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
14.05
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
789 [491] [85, 260]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
14.45
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
789 [491] [85, 260]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
14.85
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
789 [491] [85, 260]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
15.25
This should never happen, there is a hole in the triangle mesh, each edge should have two faces.
789 [491] [85, 260]
Something will still be printed, but there is no guarantee that it will be the correct shape.
Once the gcode is saved, you should check over the layer with a z of:
15.65