Failed to find a solution

Hi all,

I am using Heat transfer in Solids and Solid Mechanics modules to find the thermal stress of a PDMS micropump that contains a fluid reservoir, where the fluid will flow out due to heat.

I am using a stationary solver. When I tried to solve I got this error message:

"Failed to find a solution.
The relative error (1.3e+002) is greater than the relative tolerance.
Returned solution is not converged."

How can I fix that?

Best regards,
Marwan