open TELEMAC-MASCARET The mathematically superior suite of solvers

Thanks Sara, but my tracer is still disappearing after ca. 1296-1300 days due to non-converging of GRACJG (resulting in NaN values) even when I decreased the time step or increased the number of iterations. The boundary condition data is also correct.

I am currently running a test where I activated variable time steps to achieve a certain Courant number, but I am not convinced that this is part of the problem. Why is the solver not converging and how can I fix this?

Thanks a lot in advance for any advice.
Cheers
Robert