Troubleshooting Blocking Problems
If Meshing fails for any bodies or parts, but a blocking was created, you can use block editing tools to fix the block topology. Typical problems preventing successful meshing after blocking include the following:
Small edges or fine features: Sometimes fine features are included in the blocking topology, making it virtually impossible to get a good quality mesh in such regions of the model. In this case, you can use the Delete tool or Merge tool to defeature such problems in the blocking.
Problematic faces: In some cases, the error messages will lead to one or more problematic faces. Zoom in to look for odd shapes, missing connectivity, slivers or other similar problems. In this case, you can use the Split tool or Merge tool to fix the connectivity of the face or to simplify the face so that it is more easily meshed.
Problems creating a watertight solid: In this case, surface blocking may be generated but no volume blocks. This is typically caused by single-connected edges (no adjacent surface) or triple-connected edges. To find single and triple edges, turn on Edge Connectivity in the Display options panel, and look for red (single) and/or pink (multiple) edges. You can use the block editing tools to fix any single- or triple-connected edges in the surface blocking. For example, the Move tool may be used on an edge to close a small gap between two single-connected edges. Once all edges are double-connected, you can right-click Blocking in the Structure tree, and use Solidify to convert the surface blocking to a solid blocking.
If blocking was successful, but after some block editing, the block topology seems to be problematic, you can try to fix the blocking by right-clicking the blocking in the Structure tree and selecting . The Check/Fix operation tries to resolve some problems in indexing, orientation and connectivity that can cause problems while meshing.