Error using Algebraic Constraint in Simulink

I want to implement an equation

c= a*w*(sinwt + b*sin(2*w*t))

I tried to implement it using Algebraic Constraint block but I am getting an error

Trouble solving algebraic loop containing 'trial1/Algebraic Constraint1/Initial Guess' at time 0. Stopping simulation. There may be a singularity in the solution. If the model is correct, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)

Pl help as in what might be wrong. Or suggest what are the other ways of solving and finding a graph of w vs t(using scope).

[Paavni Shukla]

a,b and c are all constants