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Help with "Nonlinear solver did not converge"

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Good day everyone!

I am working on a multiphysics problem involving reaction engineering, thermal stress, fluid flow in porous media, and species transport in porous media. At a certain timestep, I receive the error:
"
Nonlinear solver did not converge.
Maximum number of iterations reached.
Time: [max time solved for]
Last time step is not converged.
"
I am using a fully coupled (advanced, direct) solver for now, as I haven't been able to get a segregated solver to converge for even the first time step. My question is this: Is there any way I can go into the log files and find out which of my dependent variables is causing the convergence problem?

Thank you all!

-Nathan

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