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SRH 2D Error

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I am running unsteady SMS with SRH 2D and getting the following error message mid-model run:

"Stopped in spline.f90 H"

The SMS Wiki site states that this error can be solved as follows: The time series data should only have one data value per defined time. Go to the XY series editor where the time series data is defined and remove any and every duplicate time entry. 

I have checked my time series data, and I do not have any duplicated time entries. Could this error message be related to any other issues with the way the time series data was entered?

Has anyone else experienced this error message?

Note: This error message is occurring and the model is crashing during the rising limb of the inflow hydrograph. I am guessing this error has something to do with the rapid flow increase, but my time step is already 0.5 seconds and the model is taking a while to run. Besides further reducing the time step, are there are other solutions?

Thank you!

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