[Adolfo]

Hi Benoit. Sorry, but no answer from HEC. From my experience, it’s some silly bug in the interface. Why reducing the time step made it disappear, i have no clue.

[Adolfo]

I sent a bug report to HEC. Meanwhile, i kept messing around with the project, and it begun working! I updated my email to HEC with the new information, see it below

“Regarding my yesterday’s bug report, I have some additional information. I was using a 3 h computation interval, a bit large considering the distance between river stations, but it is a very slow river, and also a preliminary simulation. I decided to change the time interval to 1 hour, and, presto! the error message disappeared, and everything seems to be working fine.

Even if a 3 h time interval were grossly wrong, symptoms would quite different, instabilities or so, not a “missing initial condition“.

Any ideas?

[Adolfo]

I’ll follow your suggestion and send HEC the problem. As for the storage area initial elevation, it is properly set, I’ve checked it a thousand times. I’ve tried all i could think, including exploratory surgery, RAS files are usually ascii and i’m very old school, ferrite core, so it was just like old times. Nothing worked. Let’s see what HEC thinks of it, and i’ll keep trying to imagine what the heck is going on.

[Adolfo]

I created a new project, and begun switching on and off the three components (1 storage area and two lateral structures) that generated the error. It seems the problem is generated by the connection between the lateral weirs and the storage area. If the weirs discharge “out of the system”, not only does the simulation run fine, but also the post-processing is okey. When i connect one or both weirs to the storage area, the simulation runs ok, but then the “missing initial elevations” message appears. Up to now i haven’t been able to find anything related to lateral structures initial conditions in the manuals.
Any ideas?

[Author]

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