In the attached code I am trying to take a constant physical unit and raise it to a power of two. The compiler is complaining that it cannot find a template to satisfy multiply_typeof_helper. It says that there are more than one partial specialization that matches the template argument list. I read something on the web about there was no pow operation for constants. The solution to that problem was to upgrade to Boost 1.48. Unforunately I am constrained to using Boost 1.45. What is an work around for this problem? Here is the compiler output with the file attached: 1>------ Build started: Project: boost_units, Configuration: Debug Win32 ------ 1>Compiling... 1>boost_units.cpp 1>C:\boost\boost/units/detail/static_rational_power.hpp(126) : error C2752: 'boost::units::multiply_typeof_helper' : more than one partial specialization matches the template argument list 1> with 1> [ 1> X=boost::units::quantitymyproject::second_types::squared_radii_unit, 1> Y=boost::units::one 1> ] 1> C:\boost\boost/units/quantity.hpp(689): could be 'boost::units::multiply_typeof_helper,Y>' 1> C:\boost\boost/units/detail/one.hpp(36): or 'boost::units::multiply_typeof_helper' 1> C:\boost\boost/units/detail/static_rational_power.hpp(93) : see reference to class template instantiation 'boost::units::detail::static_int_power_impl<1,false>::apply' being compiled 1> with 1> [ 1> Y=boost::units::quantitymyproject::second_types::squared_radii_unit, 1> R=boost::units::one 1> ] 1> C:\boost\boost/units/detail/static_rational_power.hpp(158) : see reference to class template instantiation 'boost::units::detail::static_int_power_impl<N>::apply' being compiled 1> with 1> [ 1> N=2, 1> Y=boost::units::constantmyproject::second_types::equatorial_radius_of_earth_t>, 1> R=boost::units::one 1> ] 1> C:\boost\boost/units/detail/static_rational_power.hpp(187) : see reference to class template instantiation 'boost::units::detail::static_int_power_sign_impl<N>::apply<Y>' being compiled 1> with 1> [ 1> N=2, 1> Y=boost::units::constantmyproject::second_types::equatorial_radius_of_earth_t> 1> ] 1> C:\boost\boost/units/pow.hpp(52) : see reference to class template instantiation 'boost::units::detail::static_rational_power_impl' being compiled 1> with 1> [ 1> R=boost::units::static_rational<2>, 1> Y=boost::units::constantmyproject::second_types::equatorial_radius_of_earth_t> 1> ] 1> ..\..\..\apps\boost_units\boost_units.cpp(104) : see reference to class template instantiation 'boost::units::power_typeof_helper' being compiled 1> with 1> [ 1> X=boost::units::constantmyproject::second_types::equatorial_radius_of_earth_t>, 1> Y=boost::units::static_rational<2> 1> ] 1>Build log was saved at "file://c:\documents and settings\stephen.torri\my documents\visual studio 2008\projects\satsim_boost_units\vs2008\apps\boost_units\boost_units.dir\Debug\BuildLog.htm" 1>boost_units - 1 error(s), 0 warning(s) ========== Build: 0 succeeded, 1 failed, 1 up-to-date, 0 skipped ========== Regards, Stephen