[petsc-users] variable declaration in Fortran90

[Roc Wang]

Hello,


   I am developing Fortran90 code with PETSc.  Several Modules are defined in the code. Such as

  Module MyParameter
       Implicit none
#include "finclude/petscsys.h"
#include "finclude/petscvec.h"
#include "finclude/petscmat.h"
#include "finclude/petscpc.h"
#include "finclude/petscksp.h"
#include "finclude/petscvec.h90"
#include "finclude/petscmat.h90"
 
      Integer::  ... ...
      Real:: ... ...
  

  End Module MyParameter

  Module MySub
       Use Myparameter
     Contains
       ... ...
      Call MatSetType(A_Mat, MATAIJ, ierr)
       ... ...
  EndModule MySub

 
 Main Program
      Use MyParameter
      Use MySub
 ... ...
 ... ...
 End 

 If I put all the modules in a single .F90 file, the compilation can be done successfully. However, If I put the modules in separated files,  the following error information comes out:

 Error: Symbol 'mataij' at (1) has no IMPLICIT type.

 In addition, if I use PetscInt,    PetscErrorCode to declare variables in Module MySub, the similar errors come out.  How declare the variable with PETSc type in separate files? Thanks.

  

   


   
 		 	   		  
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