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Margin of safety > Load case sets

Orphan load cases (margin of safety)

Margin of safety solutions create links to results they use. Therefore, if you rename or delete subcases that the margin of safety solution uses as load cases, and you rerun the solution, the links break and the software can no longer access the results it needs to calculate the margin of safety for these load cases. Such load cases are referred to as orphan load cases.

Detecting orphan load cases

The first clue that an orphan load case may exist is the lack of a margin of safety result in the Margin of Safety Results dialog box, in the Margins of Safety table. To verify that an orphan load case exists, in the Load Cases Editor dialog box, display the Orphan column. A selected check box in the Orphan column indicates that the corresponding load case is an orphan load case.

Removing orphan load cases

When an orphan load case exists, in the Load Cases Editor dialog box, the Clean up orphaned load cases command appears. When you select this command, the software does the following:

  • Removes renamed subcases from any load case sets for which they are a member. The software retains the renamed load case so that under its new name you can add it back into the load case sets from which it was removed, or you can add it to other load case sets.

  • Removes all deleted subcases in the margin of safety solution.

Where do I find it?

Application Pre/Post
Prerequisite An active margin of safety solution
Simulation Navigator Right-click the margin of safety solution→Edit Load Cases
How do I

Create a combined load case

Modify combined load cases in a dialog box

Modify combined load cases in a spreadsheet or text editor

Create a load case set for a margin of safety calculation

Create a load case set from margin of safety results

Learn more

Load case sets (margin of safety)

Combined load cases

Results for combined load cases

Exporting and importing load case sets (margin of safety)

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Margin of Safety methods documentation

Orphan load cases (margin of safety), Simcenter 3D 2021.1 Series

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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/xid1482662 · retrieved 2026-07-17