Problems with .stl import

Hello all,

I am a new user here and I am trying to implement a flow around a geometry. I am using the showcase externalFlowAroundObstacle to import a .stl file , but I am receiving the following error:

externalFlowAroundObstacle: /home/epoizot/Applications/palabos/src/offLattice/triangleToDef.hh:390: plb::plint plb::TriangleToDef::createEdgeTable() [with T = double; plb::plint = long int]: Assertion `false’ failed."

I am using Solidworks to create a .stl geometry and Meshlab to check for non-manifold edges/vertices. I even tried creating a simple geometry ( a cube), but the same error appears. Any tips?

Thank you