Dear Zhenghuai, It indicates that an element has a non-invertible transformation (a completely flat element).
It should be removed before doing any computation. Best regards, Yves ----- Original Message ----- From: "Zhenghuai Guo" <[email protected]> To: "yves renard" <[email protected]>, "andriy andreykiv" <[email protected]> Cc: "getfem-users" <[email protected]>, "Konstantinos Poulios" <[email protected]> Sent: Mercredi 1 Mai 2019 11:49:35 Subject: RE: How to apply hydraulic pressure on the boundary Hi, Andriy and Yves and Konstantinos, I use gmsh to build a mesh and import in getfem. In the code, I only add the getfem::add_isotropic_linearized_elasticity_brick(model, mim_1, "u_1", "lambda_1", "mu_1"); and getfem::add_Dirichlet_condition_with_multipliers(model, mim_1, "u_1", mf_u_1, total_outer_bounday_1,"Dirichlet_value" ); When I try to solve the equations, I got [cid:[email protected]] The mesh I loaded has an irregular outer boundary as below. When I change the mesh to a simple rectangle outer boundary mesh (also from gsmh), the test program runs ok. Can you please advise, what normally does this error message indicates? I suppose something is wrong with the irregular boundary mesh. Thank you very much [cid:[email protected]]
