Micro-roughness in example causes failure to run

Hello folks,

When trying to run the example extended/exotic/ucn, the code never seems to actually run, but is hung on startup. However, when commenting out the micro-roughness setting in the detector construction file, everything now works seemingly fine and the visual window shows UCNs moving through the guide.

MPT->SetMicroRoughnessParameters(30nm, 1nm, 180, 1000, 0degree, 90degree, 1neV, 1000neV, 15, 15, 0.01*degree);

I’ve encountered the same error when attempting in G4 version 11.0.2 and 10.7 on both macOS and Ubuntu.

Does anyone know what is causing this?

_Geant4 Version:_11.0.2

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