How to resolve the flow non-convergence in eco2n module?

Hello, I'm trying to simulate CO2 geological storage in aquifer composed of andesite rocks at high temperature condition, 200 degC. The CO2 was injected for 10 years and run a 1000year simulation. Unfortunately, the simulation was stopped immediately after shut-in due to flow non-convergence. but, the simulation at low temperature, 75 degC, was run until the end without error using the same settings as high temperature case. 

I'd like to know why the simulation becomes unstable under high temperature conditions and the resolution of flow non-convergence error. I attached input files. 

I would be grateful if you could provide me with any help. 

best regards,

Miku