Error during meshing a composite

Coreform Cubit Meshing
1

2 out of all volumes failed to mesh. What is the reason for the error? Here is the .cub5 file.
errorlinear021fibres.cub5 (8.7 MB)

2

You’ve got some small surfaces like this one on volume 30. Volume 29 is the same.

image
image394×307 6.27 KB

This is why the volumes can’t get sweeped.