[Toofan]

Hi,
I am trying to simulate Heat and Mass transfer during direct evaporative cooling of moist air flowing through wet parallel plates.
For that purpose I had to write a custom boundary condition on the temperature gradient at wall as follows:
del(T)/del(y) = D*(h/k)*{del(K)/del(y)}

where,
D: diffusion coefficient of water vapor
h: latent heat of vapor
k: thermal conductivity of air

The attached are files for boundary condition.

I compiled the the code and there weren't any errors.
However when I use it, the is this error: Unknown patch type......

I have included the libs ("libTempDiffGradient.so") in controlDict file but still not able execute the boundary condition.

Wanted some help in debugging the boundary condition further