Why I am receiving the following error message about singularity in the Simulink sim?

I am receiving the following error message when I am running Simulink testbench.

"An error occurred while running the simulation and the simulation was terminated Caused by: Derivative of state '1' in block 'EQ_modelling/CTLE_Gain_selection/Transfer Fcn3' at time 2.5608576988189653E-8 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)"

Please help resolve this.

[Ngonidzashe Nedziwe]

based on what u saying i would suggest finding the sample time of the simulation and then check which solve ur using, or better yet post the system u made so i can replicate it and try find the problem