why we cannot apply schrodinger's equation for relativistic particles?

Question

sidsiddhartha · Answer

@Vincent-Lyon.Fr help

kainui · Answer

Paul Dirac came up with a relativistic version of the schrodinger equation.

sidsiddhartha · Answer

i have an explanation but i dont know it's correct or not
 we prove schrodinder's equation using classical mechanics assuming mass=constant and total energy E=V+P^2/2*m, where v=pot enegry
but for motion of a relativistic particle mass cannot remain conatant it will change from position to position i think that's why schrodinger's equation is not applicable 
am i right @kainui