Deleting unreferenced entities

To facilitate model maintenance, you can identify and delete simulation entities (such as loads, constraints, groups, and so on) that are not referenced by a solution or other entities.

This feature applies only to entities associated with Simulation files. For example, if you create a group when the FEM file is the work part, that group is not deleted, even if it is not referenced.

Entities referenced directly by solutions

For entities that can be directly referenced by a solution or subcase (such as a load, constraint, simulation object, folder, solver set, or modeling object), you can specify whether to delete all entities that are not used by the currently active solution, or only those entities that are not used by any solution.

For example, a simulation might have two solutions and three loads:

	Solution 1 uses Load 1 and Load 2.Solution 2 uses Load 2.No solution uses Load 3.

When you delete all loads that are not used by any solution, only Load 3 is deleted. Load 3 is also deleted if Solution 1 is the active solution and you delete all loads that are not used by the active solution. However, if Solution 2 is the active solution and you delete all loads that are not used by the active solution, both Load 1 and Load 3 are deleted, because neither is used by Solution 2.

Entities referenced by other entities

If an entity is referenced by another entity, the referenced entity is not deleted, even if the referencing entity is not used by a solution. For example, you might create two regions and use them in a simulation object. Even if the simulation object is not used by any solution, the regions are not deleted when you delete only unused regions because they are used by the simulation object.

When you delete a referencing entity, the referenced entities are typically not deleted. For example, if an unused simulation object references two regions, and you delete only unused simulation objects, the simulation object is deleted, but the regions are not. However, if you delete both unused simulation objects and unused regions, then the simulation object and regions are both deleted (assuming that the regions are not referenced by other entities).

Note:

When you delete unused load folders, constraint folders, or simulation object folders, both the folders and the entities they contain are deleted, even if the entity is used by a solution.

For example, suppose the unused Load Folder 1 contains Load 1, and Solution 1 has a load set that also contains Load 1. When you delete all unused load folders, Load Folder 1 and Load 1 are both deleted. The load set used by Solution 1 becomes empty.

Other deletion considerations

• You can view a list of all entities that will be deleted before you perform the deletion.This can be helpful when the entities are not visible in the Simulation Navigator. For example, some modeling objects appear under the Modeling Objects node only when a particular solution is active.Tip: Make sure that your entity names are sufficiently descriptive so that you can easily identify them. This is particularly true for coordinate systems, which all have a default name of csys. To rename an entity, right-click it in the Simulation Navigator and choose Rename.

• No materials in a material library are deleted. Only unused local materials can be deleted.

Where do I find it?

Application	Pre/Post
Prerequisites	A Simulation file as the work part and displayed partThe Simulation file has a solution
Command Finder	Delete Unreferenced Entities

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Deleting unreferenced entities, Simcenter 3D 2021.1 Series

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