msre.step with CAD_to_OpenMC

[DWTheo]

I seem to have an issue with MSRE CAD geometry and gmsh used in the CAD_to_OpenMC.

I have followed the installation and operating instructions and I got an error when attempting to use the run.sh script supplied.
More specifically, during the CAD conversion process I receive the error:
Error : The 1D mesh seems not to be forming a closed loop

From some quick googling it could be a problem with newer versions of gmsh from about a year ago but was apparently fixed in the latest version of gmsh, see here.

I am using gmsh version 4.11.0, the latest version, which I assume includes the above bug fix, so that may not be the problem.

Note that I have tried the 7pin test and everything works fine.

From msre run.sh script I tried options 1 and 2 but they both fail at the same point during 2D surface meshing.

I will attach the terminal output log.
error.log

[ebknudsen]

Hey - thanks for reporting @DWTheo. I shall take a look at this problem, and try to fix it ASAP.

[ebknudsen]

I will add that this is likely caused by some "oddity" in the CAD-model that gmsh for the time being cannot handle. As you've noticed gmsh improves all the time, but there are cases where things may go wrong. I will investigate the current version of MSRE to see what can be the cause. here.

[ebknudsen]

Further inspection shows that this is indeed caused by a problem in the CAD-drawing. I've found that there is a problem with surface 16. Will fix this and upload a new step-model

[ebknudsen]

It is a matter of a bad curvature on a this particular surface, which can be fixed. I should add that it is still unclear (to me) why this causes a problem for gmsh - but as noted it can be fixed.