Poly ReTopo Error: Cross field computation fails

[Anonymous]

I have been trying to use the new Retopology tool on a Zbrushed object, I was hoping that I will be able to skip quad drawing all over it however the error ( Poly ReTopo Error: Cross field computation fails ) keeps popping up and my retopology is failing. What could be causing this? I have tried to look it up but it seems like no one had this problem. For reference the model that I'm trying to retopologize is a tree with roots.

[jillian_mack]

I am also having this issue with a mesh exported from Rino as an stl. I'm not having any fails with models created in zbrush or maya so far. I even converted the stl in zbrush to obj and same failure result when attempting remesh or retopo. The mesh is clean.

I did find a youtube video as a workaround that you could use until the real cause is resolved. Check this method on the Maya Learning Channel using Bitfrost; Skip manual mesh cleanup with Bifrost! Prepare a mesh for Remesh and Retopologize even quicker! 

[Anonymous]

I don't have much in the way of a solution, but thanks for the video. That voxelized retopology workflow looks totes amaze!

[damaggio]

Why not just use the remesh tool  in Zbrush since you have it already?

https://lesterbanks.com/2020/01/practical-examples-for-mayas-new-retopo-workflows/

[t_chanma]

This error typically appears when you're working with nonmanifold geometry.  Try running a Mesh > Cleanup in "Select" mode on it with Nonmanifold turned on in the options to find these problem areas so you can fix them.

Or as mentioned by @jillian_mack , you can also use Bifrost to quickly rebuild the mesh without any of those problem areas and then retopo that instead.

[briankineard]

So I do not have another 3D program at this time, I am using Maya for school. I am trying to retop an object for hair so I can run some functions on it. However, when I try to use the auto retop tool I either get the "Crossfield error" or a "you can't retop more than 1 object" error. I have made sure to combine all applicable objects, unified them, used the cleanup tool, manually checked to gaps, internal faces and other such non manifold geometry but I keep getting the same errors.
Is there a know solution to this issue, or should I throw in the proverbial towel and manually retop the object?