Error with boost::numeric::odeint::make_contolled for a custom error stepper

[SamyuktaV]

Hello,
I am trying to do a comparison between implicit and explicit solvers for stiff system as part of my PhD. I wanted to use a runge-kutta-fehlberg45 stepper for the comparison. I used the template from runge_kutta_fehlberg78 to build a custom stepper by changing the number and values of the parameters of the Butchers Tableau. (I am coding in C++)
This stepper works just fine when I have the problem set up with boost::numeric::ublas::vector< double >. However when I change the problem from type 'double' to type 'complex< double >', I get an error.

The system I am using has the following specifications:

• System of 2 ODEs
• The stepper is defined for the type:
  typedef boost::numeric::ublas::vector< complex< double > > comp_type;
• The stepper definition is as follows:
  typedef my_runge_kutta_fehlberg45< comp_type > error_stepper_type_expI;
• The RHS struct is defined as follows:
  *struct phys
  {
  vector_type gamma;
  comp_type sD, kD;
  phys( vector_type gam ) : gamma( gam ) { ..... }
  void operator()(const comp_type &p, comp_type &dpdt, complex< double > dt)
  { ............. }
  }; *
• The line of code causing the error is:
  nos = integrate_adaptive( make_controlled( a_err , r_err , error_stepper_type_expI() ), phys(gamma), p, 0.0, tau, dt);
  where [a_err = 1.0e-06], [r_err = 1.0e-06], [phys(gamma) is a struct whose definition is given above], [p - variable of type comp_type which contains the initial value for the IVP], [tau = 1.0] and [dt is the step size]

I get the following error:
In file included from /usr/local/include/boost/numeric/odeint/stepper/generation.hpp:21,
from /usr/local/include/boost/numeric/odeint.hpp:76,
from main.cpp:1:
/usr/local/include/boost/numeric/odeint/stepper/generation/make_controlled.hpp: In instantiation of ‘struct boost::numeric::odeint::result_of::make_controlled<my_runge_kutta_fehlberg45<boost::numeric::ublas::vector<std::complex > > >’:
/usr/local/include/boost/numeric/odeint/stepper/generation/make_controlled.hpp:71:54: required by substitution of ‘template typename boost::numeric::odeint::result_of::make_controlled::type boost::numeric::odeint::make_controlled(typename Stepper::value_type, typename Stepper::value_type, const Stepper&) [with Stepper = my_runge_kutta_fehlberg45<boost::numeric::ublas::vector<std::complex > >]’
main.cpp:715:88: required from here
/usr/local/include/boost/numeric/odeint/stepper/generation/make_controlled.hpp:65:58: error: no type named ‘type’ in ‘struct boost::numeric::odeint::get_controller<my_runge_kutta_fehlberg45<boost::numeric::ublas::vector<std::complex > > >’
typedef typename get_controller< Stepper >::type type;
^~~~
main.cpp: In function ‘int main()’:
main.cpp:715:88: error: no matching function for call to ‘make_controlled(double, double, error_stepper_type_expI)’
nos = integrate_adaptive( make_controlled( a_err , r_err , error_stepper_type_expI() ), phys(gamma), p, 0.0, tau, dt);
^
In file included from /usr/local/include/boost/numeric/odeint/stepper/generation.hpp:21,
from /usr/local/include/boost/numeric/odeint.hpp:76,
from my_rk4.hpp:11,
from main.cpp:1:
/usr/local/include/boost/numeric/odeint/stepper/generation/make_controlled.hpp:71:54: note: candidate: ‘template typename boost::numeric::odeint::result_of::make_controlled::type boost::numeric::odeint::make_controlled(typename Stepper::value_type, typename Stepper::value_type, const Stepper&)’
typename result_of::make_controlled< Stepper >::type make_controlled(
^~~~~~~~~~~~~~~
/usr/local/include/boost/numeric/odeint/stepper/generation/make_controlled.hpp:71:54: note: substitution of deduced template arguments resulted in errors seen above
/usr/local/include/boost/numeric/odeint/stepper/generation/make_controlled.hpp:85:54: note: candidate: ‘template typename boost::numeric::odeint::result_of::make_controlled::type boost::numeric::odeint::make_controlled(typename Stepper::value_type, typename Stepper::value_type, typename Stepper::time_type, const Stepper&)’
typename result_of::make_controlled< Stepper >::type make_controlled(
^~~~~~~~~~~~~~~
/usr/local/include/boost/numeric/odeint/stepper/generation/make_controlled.hpp:85:54: note: template argument deduction/substitution failed:
main.cpp:715:88: note: couldn't deduce template parameter ‘Stepper’
nos = integrate_adaptive( make_controlled( a_err , r_err , error_stepper_type_expI() ), phys(gamma), p, 0.0, tau, dt);
^
make: [: main.o] Error 1

I am not able to figure out what is causing the problem as I have only changed the data type for the input parameters. The problem seems to be coming from the namespace result_of{} function in make_contolled. I would really appreciate any assistance for this error.

Thanks in advance and looking forward to your comments.
Samyukta