!> \file
!> \author Chris Bradley
!> \brief This is an example program to solve a diffusion equation using openCMISS calls.
!>
!> \section LICENSE
!>
!> Version: MPL 1.1/GPL 2.0/LGPL 2.1
!>
!> The contents of this file are subject to the Mozilla Public License
!> Version 1.1 (the "License"); you may not use this file except in
!> compliance with the License. You may obtain a copy of the License at
!> http://www.mozilla.org/MPL/
!>
!> Software distributed under the License is distributed on an "AS IS"
!> basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
!> License for the specific language governing rights and limitations
!> under the License.
!>
!> The Original Code is openCMISS
!>
!> The Initial Developer of the Original Code is University of Auckland,
!> Auckland, New Zealand and University of Oxford, Oxford, United
!> Kingdom. Portions created by the University of Auckland and University
!> of Oxford are Copyright (C) 2007 by the University of Auckland and
!> the University of Oxford. All Rights Reserved.
!>
!> Contributor(s):
!>
!> Alternatively, the contents of this file may be used under the terms of
!> either the GNU General Public License Version 2 or later (the "GPL"), or
!> the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
!> in which case the provisions of the GPL or the LGPL are applicable instead
!> of those above. If you wish to allow use of your version of this file only
!> under the terms of either the GPL or the LGPL, and not to allow others to
!> use your version of this file under the terms of the MPL, indicate your
!> decision by deleting the provisions above and replace them with the notice
!> and other provisions required by the GPL or the LGPL. If you do not delete
!> the provisions above, a recipient may use your version of this file under
!> the terms of any one of the MPL, the GPL or the LGPL.
!>

!> \example ClassicalField/AdvectionDiffusion/StaticAdvectionDiffusion_FieldML/src/StaticAdvectionDiffusion_FieldMLExample.f90
!! Example program to solve a diffusion equation using openCMISS calls.
!!
!! \htmlinclude ClassicalField/AdvectionDiffusion/StaticAdvectionDiffusion_FieldML/history.html
!<

!> Main program
PROGRAM STATICADVECTIONDIFFUSIONEXAMPLE

  USE OPENCMISS
  USE FIELDML_API
  USE MPI


#ifdef WIN32
  USE IFQWIN
#endif

  IMPLICIT NONE

  !Test program parameters

  REAL(CMISSDP), PARAMETER :: HEIGHT=1.0_CMISSDP
  REAL(CMISSDP), PARAMETER :: WIDTH=2.0_CMISSDP
  REAL(CMISSDP), PARAMETER :: LENGTH=3.0_CMISSDP 
  REAL(CMISSDP), POINTER :: GEOMETRIC_PARAMETERS(:)
  
  INTEGER(CMISSIntg), PARAMETER :: CoordinateSystemUserNumber=1
  INTEGER(CMISSIntg), PARAMETER :: RegionUserNumber=2
  INTEGER(CMISSIntg), PARAMETER :: BasisUserNumber=3
  INTEGER(CMISSIntg), PARAMETER :: GeneratedMeshUserNumber=4
  INTEGER(CMISSIntg), PARAMETER :: MeshUserNumber=5
  INTEGER(CMISSIntg), PARAMETER :: DecompositionUserNumber=6
  INTEGER(CMISSIntg), PARAMETER :: GeometricFieldUserNumber=7
  INTEGER(CMISSIntg), PARAMETER :: EquationsSetFieldUserNumber=8
  INTEGER(CMISSIntg), PARAMETER :: DependentFieldUserNumber=9
  INTEGER(CMISSIntg), PARAMETER :: MaterialsFieldUserNumber=10
  INTEGER(CMISSIntg), PARAMETER :: EquationsSetUserNumber=11
  INTEGER(CMISSIntg), PARAMETER :: ProblemUserNumber=12
  INTEGER(CMISSIntg), PARAMETER :: ControlLoopNode=0
  INTEGER(CMISSIntg), PARAMETER :: IndependentFieldUserNumber=13
  INTEGER(CMISSIntg), PARAMETER :: AnalyticFieldUserNumber=14
  INTEGER(CMISSIntg), PARAMETER :: SourceFieldUserNumber=15

  INTEGER(CMISSIntg), PARAMETER :: MeshComponentNumber=1

  !Program types
  
  !Program variables

  INTEGER(CMISSIntg) :: NUMBER_GLOBAL_X_ELEMENTS,NUMBER_GLOBAL_Y_ELEMENTS,NUMBER_GLOBAL_Z_ELEMENTS
  INTEGER(CMISSIntg) :: NUMBER_OF_DOMAINS
  
  INTEGER(CMISSIntg) :: MPI_IERROR
  
    !CMISS variables

  TYPE(CMISSBasisType) :: Basis
  TYPE(CMISSBoundaryConditionsType) :: BoundaryConditions
  TYPE(CMISSCoordinateSystemType) :: CoordinateSystem,WorldCoordinateSystem
  TYPE(CMISSDecompositionType) :: Decomposition
  TYPE(CMISSEquationsType) :: Equations
  TYPE(CMISSEquationsSetType) :: EquationsSet
  TYPE(CMISSFieldType) :: GeometricField,EquationsSetField,DependentField,MaterialsField,IndependentField,AnalyticField,SourceField
  TYPE(CMISSFieldsType) :: Fields
  TYPE(CMISSGeneratedMeshType) :: GeneratedMesh  
  TYPE(CMISSMeshType) :: Mesh
  TYPE(CMISSProblemType) :: Problem
  TYPE(CMISSControlLoopType) :: ControlLoop
  TYPE(CMISSRegionType) :: Region,WorldRegion
  TYPE(CMISSSolverType) :: Solver, LinearSolver
  TYPE(CMISSSolverEquationsType) :: SolverEquations

  LOGICAL :: EXPORT_FIELD,IMPORT_FIELD
 

#ifdef WIN32
  !Quickwin type
  LOGICAL :: QUICKWIN_STATUS=.FALSE.
  TYPE(WINDOWCONFIG) :: QUICKWIN_WINDOW_CONFIG
#endif
  
  !Generic CMISS variables
  
  INTEGER(CMISSIntg) :: EquationsSetIndex
  INTEGER(CMISSIntg) :: FirstNodeNumber,LastNodeNumber
  INTEGER(CMISSIntg) :: Err

  INTEGER(CMISSIntg) :: dimensions, i
  
  !FieldML variables
  CHARACTER(KIND=C_CHAR,LEN=*), PARAMETER :: outputDirectory = ""
  CHARACTER(KIND=C_CHAR,LEN=*), PARAMETER :: outputFilename = "StaticAdvectionDiffusion.xml"
  CHARACTER(KIND=C_CHAR,LEN=*), PARAMETER :: basename = "static_advection_diffusion"
  CHARACTER(KIND=C_CHAR,LEN=*), PARAMETER :: dataFormat = "PLAIN_TEXT"

  TYPE(CMISSFieldMLIOType) :: fieldmlInfo

  
#ifdef WIN32
  !Initialise QuickWin
  QUICKWIN_WINDOW_CONFIG%TITLE="General Output" !Window title
  QUICKWIN_WINDOW_CONFIG%NUMTEXTROWS=-1 !Max possible number of rows
  QUICKWIN_WINDOW_CONFIG%MODE=QWIN$SCROLLDOWN
  !Set the window parameters
  QUICKWIN_STATUS=SETWINDOWCONFIG(QUICKWIN_WINDOW_CONFIG)
  !If attempt fails set with system estimated values
  IF(.NOT.QUICKWIN_STATUS) QUICKWIN_STATUS=SETWINDOWCONFIG(QUICKWIN_WINDOW_CONFIG)
#endif

  !Intialise OpenCMISS
  CALL CMISSInitialise(WorldCoordinateSystem,WorldRegion,Err)

  CALL CMISSErrorHandlingModeSet(CMISS_ERRORS_TRAP_ERROR,Err)

  NUMBER_GLOBAL_X_ELEMENTS=50
  NUMBER_GLOBAL_Y_ELEMENTS=100
  NUMBER_GLOBAL_Z_ELEMENTS=0
  NUMBER_OF_DOMAINS=1


  CALL MPI_BCAST(NUMBER_GLOBAL_X_ELEMENTS,1,MPI_INTEGER,0,MPI_COMM_WORLD,MPI_IERROR)
  CALL MPI_BCAST(NUMBER_GLOBAL_Y_ELEMENTS,1,MPI_INTEGER,0,MPI_COMM_WORLD,MPI_IERROR)
  CALL MPI_BCAST(NUMBER_GLOBAL_Z_ELEMENTS,1,MPI_INTEGER,0,MPI_COMM_WORLD,MPI_IERROR)
  CALL MPI_BCAST(NUMBER_OF_DOMAINS,1,MPI_INTEGER,0,MPI_COMM_WORLD,MPI_IERROR)
  
  IF( NUMBER_GLOBAL_Z_ELEMENTS == 0 ) THEN
    dimensions = 2
  ELSE
    dimensions = 3
  ENDIF

  !Start the creation of a new RC coordinate system
  CALL CMISSCoordinateSystem_Initialise(CoordinateSystem,Err)
  CALL CMISSCoordinateSystem_CreateStart(CoordinateSystemUserNumber,CoordinateSystem,Err)
  CALL CMISSCoordinateSystem_DimensionSet(CoordinateSystem,dimensions,Err)
  !Finish the creation of the coordinate system
  CALL CMISSCoordinateSystem_CreateFinish(CoordinateSystem,Err)
  
  !Start the creation of the region
  CALL CMISSRegion_Initialise(Region,Err)
  CALL CMISSRegion_CreateStart(RegionUserNumber,WorldRegion,Region,Err)
  !Set the regions coordinate system to the 2D RC coordinate system that we have created
  CALL CMISSRegion_CoordinateSystemSet(Region,CoordinateSystem,Err)
  !Finish the creation of the region
  CALL CMISSRegion_CreateFinish(Region,Err)
  
  !Start the creation of a basis (default is trilinear lagrange)
  CALL CMISSBasis_Initialise(Basis,Err)
  CALL CMISSBasis_CreateStart(BasisUserNumber,Basis,Err)
  CALL CMISSBasis_NumberOfXiSet(Basis,dimensions,Err)
  !Finish the creation of the basis
  CALL CMISSBasis_CreateFinish(BASIS,Err)
  
  !Start the creation of a generated mesh in the region
  CALL CMISSGeneratedMesh_Initialise(GeneratedMesh,Err)
  CALL CMISSGeneratedMesh_CreateStart(GeneratedMeshUserNumber,Region,GeneratedMesh,Err)
  !Set up a regular x*y*z mesh
  CALL CMISSGeneratedMesh_TypeSet(GeneratedMesh,CMISS_GENERATED_MESH_REGULAR_MESH_TYPE,Err)
  !Set the default basis
  CALL CMISSGeneratedMesh_BasisSet(GeneratedMesh,Basis,Err)   
  !Define the mesh on the region
  IF(dimensions == 2) THEN
    CALL CMISSGeneratedMesh_ExtentSet(GeneratedMesh,(/WIDTH,HEIGHT/),Err)
    CALL CMISSGeneratedMesh_NumberOfElementsSet(GeneratedMesh,(/NUMBER_GLOBAL_X_ELEMENTS,NUMBER_GLOBAL_Y_ELEMENTS/),Err)
  ELSE
    CALL CMISSGeneratedMesh_ExtentSet(GeneratedMesh,(/WIDTH,HEIGHT,LENGTH/),Err)
    CALL CMISSGeneratedMesh_NumberOfElementsSet(GeneratedMesh,(/NUMBER_GLOBAL_X_ELEMENTS,NUMBER_GLOBAL_Y_ELEMENTS, &
      & NUMBER_GLOBAL_Z_ELEMENTS/),Err)
  ENDIF
  !Finish the creation of a generated mesh in the region
  CALL CMISSMesh_Initialise(Mesh,Err)
  CALL CMISSGeneratedMesh_CreateFinish(GeneratedMesh,MeshUserNumber,Mesh,Err)
  
  !Create a decomposition
  CALL CMISSDecomposition_Initialise(Decomposition,Err)
  CALL CMISSDecomposition_CreateStart(DecompositionUserNumber,Mesh,Decomposition,Err)
  !Set the decomposition to be a general decomposition with the specified number of domains
  CALL CMISSDecomposition_TypeSet(Decomposition,CMISS_DECOMPOSITION_CALCULATED_TYPE,Err)
  CALL CMISSDecomposition_NumberOfDomainsSet(Decomposition,NUMBER_OF_DOMAINS,Err)
  !Finish the decomposition
  CALL CMISSDecomposition_CreateFinish(Decomposition,Err)
  
  !Start to create a default (geometric) field on the region
  CALL CMISSField_Initialise(GeometricField,Err)
  CALL CMISSField_CreateStart(GeometricFieldUserNumber,Region,GeometricField,Err)
  !Set the decomposition to use
  CALL CMISSField_MeshDecompositionSet(GeometricField,Decomposition,Err)
  !Set the domain to be used by the field components.
  DO i = 1, dimensions
    CALL CMISSField_ComponentMeshComponentSet(GeometricField,CMISS_FIELD_U_VARIABLE_TYPE,i,MeshComponentNumber,Err)
  ENDDO
  !Finish creating the field
  CALL CMISSField_CreateFinish(GeometricField,Err)
  
  !Update the geometric field parameters
  CALL CMISSGeneratedMesh_GeometricParametersCalculate(GeneratedMesh,GeometricField,Err)
  
  !Create the equations_set
  CALL CMISSEquationsSet_Initialise(EquationsSet,Err)
    CALL CMISSField_Initialise(EquationsSetField,Err)
  CALL CMISSEquationsSet_CreateStart(EquationsSetUserNumber,Region,GeometricField,CMISS_EQUATIONS_SET_CLASSICAL_FIELD_CLASS, &
    & CMISS_EQUATIONS_SET_ADVECTION_DIFFUSION_EQUATION_TYPE,CMISS_EQUATIONS_SET_CONSTANT_SOURCE_STATIC_ADVEC_DIFF_SUBTYPE,&
    & EquationsSetFieldUserNumber,EquationsSetField,EquationsSet,Err)
  !Set the equations set to be a standard Laplace problem
  !Finish creating the equations set
  CALL CMISSEquationsSet_CreateFinish(EquationsSet,Err)

  !Create the equations set dependent field variables
  CALL CMISSField_Initialise(DependentField,Err)
  CALL CMISSEquationsSet_DependentCreateStart(EquationsSet,DependentFieldUserNumber,DependentField,Err)
  !Finish the equations set dependent field variables
  CALL CMISSEquationsSet_DependentCreateFinish(EquationsSet,Err)

  !Create the equations set material field variables
  CALL CMISSField_Initialise(MaterialsField,Err)
  CALL CMISSEquationsSet_MaterialsCreateStart(EquationsSet,MaterialsFieldUserNumber,MaterialsField,Err)
  !Finish the equations set dependent field variables
  CALL CMISSEquationsSet_MaterialsCreateFinish(EquationsSet,Err)

  !Create the equations set source field variables
  !For comparison withe analytical solution used here, the source field must be set to the following:
  !f(x,y) = 2.0*tanh(-0.1E1+Alpha*(TanPhi*x-y))*(1.0-pow(tanh(-0.1E1+Alpha*(TanPhi*x-y)),2.0))*Alpha*Alpha*TanPhi*TanPhi
  !+2.0*tanh(-0.1E1+Alpha*(TanPhi*x-y))*(1.0-pow(tanh(-0.1E1+Alpha*(TanPhi*x-y)),2.0))*Alpha*Alpha
  !-Peclet*(-sin(6.0*y)*(1.0-pow(tanh(-0.1E1+Alpha*(TanPhi*x-y)),2.0))*Alpha*TanPhi+cos(6.0*x)*(1.0-pow(tanh(-0.1E1+Alpha*(TanPhi*x-y)),2.0))*Alpha)
  CALL CMISSField_Initialise(SourceField,Err)
  CALL CMISSEquationsSet_SourceCreateStart(EquationsSet,SourceFieldUserNumber,SourceField,Err)
  CALL CMISSField_ComponentInterpolationSet(SourceField,CMISS_FIELD_U_VARIABLE_TYPE,1,CMISS_FIELD_NODE_BASED_INTERPOLATION,Err)
  !Finish the equations set dependent field variables
  CALL CMISSEquationsSet_SourceCreateFinish(EquationsSet,Err)

  CALL CMISSField_ParameterSetDataGet(GeometricField,CMISS_FIELD_U_VARIABLE_TYPE,CMISS_FIELD_VALUES_SET_TYPE,GEOMETRIC_PARAMETERS, &
    & Err)
  !Create the equations set independent field variables
  CALL CMISSField_Initialise(IndependentField,Err)
  CALL CMISSEquationsSet_IndependentCreateStart(EquationsSet,IndependentFieldUserNumber,IndependentField,Err)
  IF( dimensions == 2 ) THEN
  !For comparison withe analytical solution used here, the independent field must be set to the following:
  !w(x,y)=(sin 6y,cos 6x) FIELD_U_VARIABLE_TYPE,1,FIELD_NODE_BASED_INTERPOLATION
!   CALL CMISSField_ComponentInterpolationSet(IndependentField,CMISS_FIELD_U_VARIABLE_TYPE,1,CMISS_FIELD_NODE_BASED_INTERPOLATION,Err) 
!   CALL CMISSField_ComponentInterpolationSet(IndependentField,CMISS_FIELD_U_VARIABLE_TYPE,2,CMISS_FIELD_NODE_BASED_INTERPOLATION,Err)
  !Loop over nodes to set the appropriate function value
!    DO

!    ENDDO
  ENDIF
  !Finish the equations set dependent field variables
  CALL CMISSEquationsSet_IndependentCreateFinish(EquationsSet,Err)

  !Create the equations set analytic field variables
  CALL CMISSField_Initialise(AnalyticField,Err)
  IF( dimensions == 2) THEN  
    CALL CMISSEquationsSet_AnalyticCreateStart(EquationsSet,CMISS_EQUATIONS_SET_ADVECTION_DIFFUSION_EQUATION_TWO_DIM_1,&
      & AnalyticFieldUserNumber,AnalyticField,Err)
  ELSE
    WRITE(*,'(A)') "Three dimensions is not implemented."
    STOP
  ENDIF
  !Finish the equations set analytic field variables
  CALL CMISSEquationsSet_AnalyticCreateFinish(EquationsSet,Err)

  !Create the equations set equations
  CALL CMISSEquations_Initialise(Equations,Err)
  CALL CMISSEquationsSet_EquationsCreateStart(EquationsSet,Equations,Err)
  !Set the equations matrices sparsity type
  CALL CMISSEquations_SparsityTypeSet(Equations,CMISS_EQUATIONS_SPARSE_MATRICES,Err)
  !Set the equations set output
  !CALL CMISSEquations_OutputTypeSet(Equations,CMISS_EQUATIONS_NO_OUTPUT,Err)
  !CALL CMISSEquations_OutputTypeSet(Equations,CMISS_EQUATIONS_TIMING_OUTPUT,Err)
  !CALL CMISSEquations_OutputTypeSet(Equations,CMISS_EQUATIONS_MATRIX_OUTPUT,Err)
  !CALL CMISSEquations_OutputTypeSet(Equations,CMISS_EQUATIONS_ELEMENT_MATRIX_OUTPUT,Err)
  !Finish the equations set equations
  CALL CMISSEquationsSet_EquationsCreateFinish(EquationsSet,Err)
  
!   !Create the equations set boundary conditions
!   CALL CMISSBoundaryConditions_Initialise(BoundaryConditions,Err)
!   CALL CMISSEquationsSetBoundaryConditionsCreateStart(EquationsSet,BoundaryConditions,Err)
!   !Set the first node to 0.0 and the last node to 1.0
!   FirstNodeNumber=1
!   IF( dimensions == 2 ) THEN
!     LastNodeNumber=(NUMBER_GLOBAL_X_ELEMENTS+1)*(NUMBER_GLOBAL_Y_ELEMENTS+1)
!   ELSE
!     LastNodeNumber=(NUMBER_GLOBAL_X_ELEMENTS+1)*(NUMBER_GLOBAL_Y_ELEMENTS+1)*(NUMBER_GLOBAL_Z_ELEMENTS+1)
!   ENDIF
!   CALL CMISSBoundaryConditions_SetNode(BoundaryConditions,CMISS_FIELD_U_VARIABLE_TYPE,1,FirstNodeNumber,1, &
!     & CMISS_BOUNDARY_CONDITION_FIXED,0.0_CMISSDP,Err)
!   CALL CMISSBoundaryConditions_SetNode(BoundaryConditions,CMISS_FIELD_DELUDELN_VARIABLE_TYPE,1,LastNodeNumber,1, &
!     & CMISS_BOUNDARY_CONDITION_FIXED,1.0_CMISSDP,Err)
!   !Finish the creation of the equations set boundary conditions
!   CALL CMISSEquationsSetBoundaryConditionsCreateFinish(EquationsSet,Err)

!   EXPORT_FIELD=.TRUE.
!   IF(EXPORT_FIELD) THEN
!     CALL CMISSFields_Initialise(Fields,Err)
!     CALL CMISSFields_Create(Region,Fields,Err)
!     CALL CMISSFields_NodesExport(Fields,"StaticAdvectionDiffusionInitial","FORTRAN",Err)
!     CALL CMISSFields_ElementsExport(Fields,"StaticAdvectionDiffusionInitial","FORTRAN",Err)
!     CALL CMISSFields_Finalise(Fields,Err)
! 
!   ENDIF


  !Create the problem
  CALL CMISSProblem_Initialise(Problem,Err)
  CALL CMISSProblem_CreateStart(ProblemUserNumber,Problem,Err)
  !Set the problem to be a no source static advection Diffusion problem
!   CALL CMISSProblem_SpecificationSet(Problem,CMISS_PROBLEM_CLASSICAL_FIELD_CLASS,CMISS_PROBLEM_ADVECTION_DIFFUSION_EQUATION_TYPE, &
!     & CMISS_PROBLEM_NO_SOURCE_STATIC_ADVEC_DIFF_SUBTYPE,Err)
  CALL CMISSProblem_SpecificationSet(Problem,CMISS_PROBLEM_CLASSICAL_FIELD_CLASS,CMISS_PROBLEM_ADVECTION_DIFFUSION_EQUATION_TYPE, &
    & CMISS_PROBLEM_LINEAR_SOURCE_STATIC_ADVEC_DIFF_SUBTYPE,Err)
  !Finish the creation of a problem.
  CALL CMISSProblem_CreateFinish(Problem,Err)

  !Create the problem control
  CALL CMISSProblem_ControlLoopCreateStart(Problem,Err)
  !CALL CMISSControlLoop_Initialise(ControlLoop,Err)
  !Get the control loop
  !CALL CMISSProblem_ControlLoopGet(Problem,ControlLoopNode,ControlLoop,Err)
  !Set the times
  !CALL CMISSControlLoop_TimesSet(ControlLoop,0.0_CMISSDP,1.0_CMISSDP,0.1_CMISSDP,Err)
  !Finish creating the problem control loop
  CALL CMISSProblem_ControlLoopCreateFinish(Problem,Err)

  !Start the creation of the problem solvers
!  
! !   !For the Direct Solver MUMPS, uncomment the below two lines and comment out the above five
! !   CALL SOLVER_LINEAR_TYPE_SET(LINEAR_SOLVER,SOLVER_LINEAR_DIRECT_SOLVE_TYPE,ERR,ERROR,*999)
! !   CALL SOLVER_LINEAR_DIRECT_TYPE_SET(LINEAR_SOLVER,SOLVER_DIRECT_MUMPS,ERR,ERROR,*999) 
! 

  CALL CMISSSolver_Initialise(Solver,Err)
  !CALL CMISSSolver_Initialise(LinearSolver,Err)
  CALL CMISSProblem_SolversCreateStart(Problem,Err)
  CALL CMISSProblem_SolverGet(Problem,CMISS_CONTROL_LOOP_NODE,1,Solver,Err)
  !CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_NO_OUTPUT,Err)
  !CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_PROGRESS_OUTPUT,Err)
  !CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_TIMING_OUTPUT,Err)
  !CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_SOLVER_OUTPUT,Err)
  CALL CMISSSolver_OutputTypeSet(Solver,CMISS_SOLVER_PROGRESS_OUTPUT,Err)
  !CALL CMISSSolver_DynamicLinearSolverGet(Solver,LinearSolver,Err)
  !CALL CMISSSolver_LinearIterativeMaximumIterationsSet(LinearSolver,300,Err)
  !Finish the creation of the problem solver
  CALL CMISSProblem_SolversCreateFinish(Problem,Err)


  !Create the problem solver equations
  CALL CMISSSolver_Initialise(Solver,Err)
  CALL CMISSSolverEquations_Initialise(SolverEquations,Err)
  CALL CMISSProblem_SolverEquationsCreateStart(Problem,Err)
  !Get the solve equations
  CALL CMISSProblem_SolverGet(Problem,CMISS_CONTROL_LOOP_NODE,1,Solver,Err)
  CALL CMISSSolver_SolverEquationsGet(Solver,SolverEquations,Err)
  !Set the solver equations sparsity
  CALL CMISSSolverEquations_SparsityTypeSet(SolverEquations,CMISS_SOLVER_SPARSE_MATRICES,Err)
  !CALL CMISSSolverEquations_SparsityTypeSet(SolverEquations,CMISS_SOLVER_FULL_MATRICES,Err)  
  !Add in the equations set
  CALL CMISSSolverEquations_EquationsSetAdd(SolverEquations,EquationsSet,EquationsSetIndex,Err)
  !Finish the creation of the problem solver equations
  CALL CMISSProblem_SolverEquationsCreateFinish(Problem,Err)
  CALL CMISSBoundaryConditions_Initialise(BoundaryConditions,Err)
  CALL CMISSSolverEquations_BoundaryConditionsCreateStart(SolverEquations,BoundaryConditions,Err)
  CALL CMISSSolverEquations_BoundaryConditionsAnalytic(SolverEquations,Err)
  CALL CMISSSolverEquations_BoundaryConditionsCreateFinish(SolverEquations,Err)
  
  !Solve the problem
  CALL CMISSProblem_Solve(Problem,Err)

 !Output Analytic analysis
  Call CMISSAnalyticAnalysisOutput(DependentField,"StaticAdvectionDiffusionAnalytics",Err)

  EXPORT_FIELD=.TRUE.
  IF(EXPORT_FIELD) THEN
    !CALL CMISSFields_Initialise(Fields,Err)
    !CALL CMISSFields_Create(Region,Fields,Err)
    !CALL CMISSFields_NodesExport(Fields,"StaticAdvectionDiffusion","FORTRAN",Err)
    !CALL CMISSFields_ElementsExport(Fields,"StaticAdvectionDiffusion","FORTRAN",Err)
    !CALL CMISSFields_Finalise(Fields,Err)
   
    CALL CMISSFieldMLIO_Initialise( fieldmlInfo, err ) 
    CALL CMISSFieldML_OutputCreate( Mesh, outputDirectory, basename, dataFormat, fieldmlInfo, err )

    CALL CMISSFieldML_OutputAddField( fieldmlInfo, baseName//".geometric", dataFormat, GeometricField, &
      & CMISS_FIELD_U_VARIABLE_TYPE, CMISS_FIELD_VALUES_SET_TYPE, err )

    CALL CMISSFieldML_OutputAddField( fieldmlInfo, baseName//".dependent", dataFormat, DependentField, &
      & CMISS_FIELD_U_VARIABLE_TYPE, CMISS_FIELD_VALUES_SET_TYPE, err )

    CALL CMISSFieldML_OutputAddField( fieldmlInfo, baseName//".independent", dataFormat, IndependentField, &
      & CMISS_FIELD_U_VARIABLE_TYPE, CMISS_FIELD_VALUES_SET_TYPE, err )

    CALL CMISSFieldML_OutputAddField( fieldmlInfo, baseName//".source", dataFormat, SourceField, &
      & CMISS_FIELD_U_VARIABLE_TYPE, CMISS_FIELD_VALUES_SET_TYPE, err )

    CALL CMISSFieldML_OutputAddField( fieldmlInfo, baseName//".materials", dataFormat, MaterialsField, &
      & CMISS_FIELD_U_VARIABLE_TYPE, CMISS_FIELD_VALUES_SET_TYPE, err )

    !CALL FieldmlOutputAddField( fieldmlInfo, baseName//".analytic", dataFormat, region, mesh, AnalyticField, &
    !  & CMISS_FIELD_U_VARIABLE_TYPE, CMISS_FIELD_VALUES_SET_TYPE, err )
    
    CALL CMISSFieldML_OutputWrite( fieldmlInfo, outputFilename, err )
    
    CALL CMISSFieldMLIO_Finalise( fieldmlInfo, err )

  ENDIF

  !CALL CMISSFinalise(Err)
  WRITE(*,'(A)') "Program successfully completed."
  
  STOP

END PROGRAM STATICADVECTIONDIFFUSIONEXAMPLE