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AtChem / AtChem2

Atmospheric chemistry box-model for the MCM
MIT License
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Run stops after sometime #506

Closed tanzinaakther closed 1 year ago

tanzinaakther commented 1 year ago

After running for sometimes, it stops. What does this error mean? I did not change or replace any file. Just unconstrained J1, J4. Before it was running properly.

[CVODE ERROR] CVode At t = 86420.3 and h = 0.00145844, the error test failed repeatedly or with |h| = hmin.

time = 86400 ier POST FCVODE()= -3 Note: The following floating-point exceptions are signalling: IEEE_UNDERFLOW_FLAG IEEE_DENORMAL SUNDIALS_ERROR: FCVODE() returned ier = -3 Linear Solver returned ier = 0 time = 86420

rs028 commented 1 year ago

Usually, this means a numerical error by the integrator. Most likely a number has become too small or too large in too short a period of time. There is not a lot that can be done, I am afraid. I think it depends on how the values in your system evolve with time, so all I can suggest is look at that. Maybe you can change a bit some of the conditions to get around the issue or stop the model before it crashes.

tanzinaakther commented 1 year ago

Ok. Thank you so much.