Help regarding STL file building

[milin333martin]

We are using a code built on top of the EB_CNS tutorial. I have been working on generating an STL geometry using the STL functionalities provided by the EB libraries. The case we are trying to simulate involves a flow transitioning from a wider (original) domain into a block with multiple holes.

The executable compiles successfully, but when loading the STL, the run gets stuck in a deadlock and does not progress beyond the STL build phase. I would appreciate any insights or guidance on why this might be happening.

For reference, I am attaching my STL geometry to this thread. Notably, I encountered the same issue even when constructing the geometry using implicit functions (shapes, intersections, etc.), so the problem seems to persist regardless of the method used.

B3.zip

On using conventional STL build approach as:
eb2.geom_type = stl
eb2.stl_file = B3.stl # CylinderTube.stl #
eb2.stl_scale = 1 # Adjust as needed
eb2.stl_center = 0.045 0.0001 0.0001 # Adjust to your desired center
eb2.stl_reverse_normal = 0 # Set to 1 if you need to reverse the normals
eb2.cover_multiple_cuts = 1
eb2.num_coarsen_opt = 1

I come across, issues such as :
AMReX EB: Iter. 32 fixed 26 small cells
4::Assertion `iter < maxiter' failed, file "/scratch/user/milin333martin/Milin/amrex_new//Src/EB/AMReX_EB2_Level.H", line 501, Msg: "EB: failed to fix small cells" !!!

or sometimes:
amrex::Abort::0::Failed to build required coarse EB level 1 !!!

I tried playing around with the geometry and the domain, but I seem to not have a fix for the problem.