i cant isolate equation for a certain variable .. plz help

Good evening

plz help me to isolate this equation for beta; where beta is inside the gamma function

syms beta omega K m gamb  alpha ;
solve(' 1-gammainc(K*m, m*beta/(omega*gamb))/gamma(K*m)-alpha ','beta')

it gives me

" Warning: Explicit solution could not be found. > In solve at 81 In eq12 at 7

ans =

[ empty sym ] "

Thanks in advance