private void DrawMapModel(Model m)
        {
            Matrix[] transforms = new Matrix[m.Bones.Count];
            m.CopyAbsoluteBoneTransformsTo(transforms);

            // Initialize an array of indices for the box. 12 lines require 24 indices
            short[] bBoxIndices = {
                    0, 1, 1, 2, 2, 3, 3, 0, // Front edges
                    4, 5, 5, 6, 6, 7, 7, 4, // Back edges
                    0, 4, 1, 5, 2, 6, 3, 7 // Side edges connecting front and back
            };

            foreach (ModelMesh mesh in m.Meshes)
            {
                //This fixes the lighting conditions
                foreach (Effect e in mesh.Effects)
                {
                    IEffectLights iel = e as IEffectLights;
                    if (iel != null)
                        iel.EnableDefaultLighting();
                }

                foreach (BasicEffect effect in mesh.Effects)
                {
                    effect.TextureEnabled = true;
                    effect.World = transforms[mesh.ParentBone.Index] *
                        Matrix.CreateScale(1.5f);
                        Matrix.CreateTranslation(mapPosition);
                    effect.View = viewMatrix;
                    effect.Projection = projectionMatrix;
                }

                //TEST - Draw lines around the edges of the bounding
                //boxes
                foreach (BasicEffect effect in mesh.Effects)
                {
                    foreach (BoundingBox box in mapBoxes)
                    {
                        Vector3[] corners = box.GetCorners();
                        VertexPositionColor[] primitiveList = new
                                VertexPositionColor[corners.Length];

                        // Assign the 8 box vertices
                        for (int i = 0; i < corners.Length; i++)
                        {
                            primitiveList[i] = new VertexPositionColor(corners[i], Color.White);
                        }

                        /* Set your own effect parameters here */

                        effect.World = Matrix.Identity;
                        effect.View = viewMatrix;
                        effect.Projection = projectionMatrix;
                        effect.TextureEnabled = false;

                        // Draw thebox with a LineList
                        foreach (EffectPass pass in effect.CurrentTechnique.Passes)
                        {
                            pass.Apply();



// THIS IS WHERE THE ERROR OCCURS:


                            game.GraphicsDevice.DrawUserIndexedPrimitives(
                                PrimitiveType.LineList, primitiveList, 0, 8, bBoxIndices, 0, 12);





                        }
                    }
                }
                mesh.Draw();
            }
        }