0116_H_PULM_ALGS has a model creation error

Description

Moving on to the next Alagille model 0116_H_PULM_ALGS, we are faced with a "[GetSingleLoop] An error occurred processing cell 2" warning while trying to create the model from the segmentations.

Tracing back to https://github.com/SimVascular/SimVascular/issues/1154 I discovered the following: "The PolyDataException exception object returns the triangle where the computation goes into an infinite loop. This is then displayed in red. The user can then loft the segmentations used in the union to get an idea what the problem is and possibly modify the segmentations a bit to fix it."

Posting this issue to start my investigation and logging of findings.

Reproduction

Launch SimVascular 2025.12.21 from Ubuntu 24 computer and try to build a model from the segmentations.

Expected behavior

Create a nice model from the segmentations.

Additional context

No response

Code of Conduct

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Reproduce the model-building failure in SimVascular 2025.12.21 on Ubuntu 24 and capture the “GetSingleLoop” warning for cell 2. Read issue #1154 for the PolyDataException guidance, then document what the investigation reveals about the 0116_H_PULM_ALGS segmentations and the model-creation error.