[Soot-list] creating object of class in its own function

[suraj kath]

i wrote the code
please tell me what is wrong with this
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protected void internalTransform(Body body, String phase, Map options) {
    

  




		SootMethod method = body.getMethod();


		sClass=method.getDeclaringClass();

                        

                      Chain units=body.getUnits();

                      Stmt stmt=null;
                       Iterator stmtIt = units.snapshotIterator();
                     
                    
                      stmt= (Stmt)stmtIt.next();



                      Local obj=Jimple.v().newLocal("obj",sClass.getType());
                      body.getLocals().add(obj);


                     Stmt assstm= Jimple.v().newAssignStmt(obj, Jimple.v().newNewExpr(sClass.getType()));


                      units.insertAfter(assstm,stmt);//it is inserting the object but then running the class file causes error


  }