I am getting an error like this in simulink, please suggest me a idea to tackle this

Derivative of state '1' in block 'mini_project_new3/SubsPQR /p' at time 0.17500000000000002 is not finite. The simulation will be stopped. There may be a singularity in the solution. If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances) Component: Simulink | Category: Block error