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zbrush 4r8 keeps crashing when duplicating low res mesh HELP!

Hello everyone,

I created a low res geo in Maya .fbx and imported over to zbrush to sculpt in details but has soon has i duplicate the mesh to mirror zbrush crashes. i never had this issue with zbrush crashing so often in any other project and am wondering if it could be the geo? so i did a brief review and clean up on mesh and everything looks fine. the geo is low 18000 so dynameshed it successfully to see if this solves the problem but when i try to duplicate crashes!. I also zremesher it and try to duplicate and also crashes. Not sure what to do i cant move forward and would like to progress. If anyone has any ideas how to solve this issue please help! thank you in advance.

Try checking the mesh integrity before you duplicate it (Tool > Geometry > MeshIntegrity).