In the current PyLith multiphysics branch (knepley/feature-petsc-fe), we will not allow multiple Neumann BC per field. PETSc currently assumes that there is only one Neumann BC per field and we have not yet identified a good way to allow multiple Neumann BC per field. The workaround is to use the spatial database to create the desired spatial variation in the parameters.
In the current PyLith multiphysics branch (knepley/feature-petsc-fe), we will not allow multiple Neumann BC per field. PETSc currently assumes that there is only one Neumann BC per field and we have not yet identified a good way to allow multiple Neumann BC per field. The workaround is to use the spatial database to create the desired spatial variation in the parameters.