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The input mesh has disjoint components

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About the error

Issue: Sometimes meshes have parts that aren’t physically connected or parts that intersect within themselves. These can be intentional or unintentional and are called disjoint components. The CAD Body from Quad Mesh workflow doesn’t support disjointed mesh components. The mesh needs to be connected to every part in it without self-intersections. Using Merge Meshes won’t fix this issue if they are physically connected because it causes self-intersections. It is best to use Boolean Union to join any bodies together before the mesh step. To run the workflow, the mesh needs to be split up into separate parts. Even if your mesh block isn’t a list, it may have multiple components. If you want every mesh component converted into a CAD body, you need to run the workflow for each component separately. Applies to:
  • CAD Body from Quad Mesh
  • Quadrangulate Mesh
Cause:
  • A mesh with multiple components (can be large or small disjointed parts) used to create a CAD Body. Disjointed components aren’t supported in this workflow.
  • A mesh with self-intersections.
Solution:
  • Use the Split Mesh block on the disjointed mesh to separate the components. Open up the Properties panel of the Split Mesh block to extract the mesh components.
  • Use the Boolean Union block before converting the body to a mesh if it has multiple components that are physically connected, causing self-intersections. This only works when the parts are physically connected.
Disjoint Mesh Example 1

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A manifold mesh is expected

About the error Issue: The input mesh is non-manifold. Non-manifold is defined as geometry where at least one edge does not have exactly two faces merging with it, meaning that it cannot exist in the physical world. Applies to:
  • CAD Body from Quad Mesh
  • Quadrangulate Mesh
  • Mesh export
  • Refine Mesh
Cause: A mesh can be non-manifold for many reasons. The list below shows the most common occurrences:
  • An edge is connected to more or less than two faces (including internal faces)
  • Separate regions are connected through a single vertex
  • The mesh has loose geometry (discontinuous)
  • Mesh elements have plane normals pointing in opposite directions for adjacent faces
Solution:
  • To check if your mesh is manifold or not, click on the info (?) panel and go to Properties. Inspect the values of Edge Manifold and Vertex Manifold properties. If either of them are False, then it is not manifold; if both are True, then it is.
  • Clean or refine the mesh. Some blocks that can help: Remesh Surface, Refine Mesh, Simplify Mesh by Threshold, Simplify Mesh by Amount.
  • Edit the Adaptivity and Feature Size of a Remesh block.
  • If your mesh is still non-manifold after trying these steps, you may have to go back to your original part in a different program and try cleaning it up. Sending it to another program like Magics may also be necessary.
  • If you are trying to create a Quad Mesh using the Quadrangulate Mesh block, use one of the refinement blocks mentioned above. Inputting a Mesh from Implicit Body or Mesh from CAD Body block will most likely cause an error when used without a refinement step.

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No mesh entities were found

About the error Issue: When creating a boundary or region, input selection didn’t find any mesh entities. Applies to:
  • FE Boundary by Flood Fill
  • FE Boundary by Body
  • FE Region by Body
Cause:
  • The input parameters weren’t able to find mesh entities to create a boundary or region from. At least one mesh entity is required.
Solution:
  • Adjust the origin, angle, direction, or body position to select mesh entities.

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Cannot generate mesh with the selected inputs

About the error Issue: The mesh can’t build due to the limitations set by the inputs. Applies to:
  • Volume Mesh
Cause:
  • The input values can’t be built due to the shape of the mesh.
Solution:
  • Change the mesh shape.
  • Edit the inputs.

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Surface meshing errors occurred

About the error Issue: The mesh wasn’t able to build properly. Applies to:
  • Remesh Surface
Cause:
  • The original mesh is non-manifold, has artifacts, or intersections.
  • The input values created a mesh that couldn’t build.
Solution:
  • Refine the mesh before using the Remesh Surface block.
  • Edit the input values.

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The mesh produced is expected to contain faces

About the error Issue: Occurs when converting an Implicit Body into a mesh. When the feature size is larger than the largest details in the Implicit Body, it won’t be able to create a mesh. Applies to:
  • Mesh from Implicit Body
  • Converting an Implicit Body into a mesh
Cause:
  • Using a feature size that is larger than the largest detail in the Implicit Body.
Solution:
  • Adjust the feature size to be smaller than the details of the Implicit Body.