CFD Online Discussion Forums - Leaking snappyHexMesh

Dear All,
I am trying to mesh an enclosure. I am using a closed volume for volume meshing and extracted surfaces for creating patches. There is 1 inlet and 1 outlet.
The problem is, if I mesh the volume without surface STLs as patches it meshes perfectly. As soon as I use extracted STL surfaces as patches it leaks, the same volume STL. I am attaching the two cases pictures.

Code:

geometry

{

    fixed.stl

    {

        type triSurfaceMesh;

        name fixed;

        regions 

          { 

              CFD_VOLUME_08             // Named region in the STL file 

              { 

                  name wallsassy; // User-defined patch name 

              }                       

          }

  

    }

    inlet.stl

    {

        type triSurfaceMesh;

        name inlet;

    }



    outlet.stl

    {

        type triSurfaceMesh;

        name outlet;

    }

/*    canopy.stl

    {

        type triSurfaceMesh;

        name canopy;

    }*/

As soon as I activate the canopy.stl, it starts leaking.
Kindly help..