NEGATIVE AREA IN SUBROUTINE CONVEY

[SaraA]

Hi,

I have the following error in a bridge of my model when I run an unsteady flow simulation.
The error is the following:

–PROGRAM ABORTED–
NEGATIVE AREA IN SUBROUTINE CONVEY
BETWEEN STATION 1813.04 AND 2035.76
Paglia Reach 1 -12172.7
THIS IS USUALLY CAUSED BY BAD STATION/ELEVATION DATA
IF THIS NODE HAS A WEIR (BRIDGE etc.) CHECK THE ROAD DECK DATA CAREFULLY

Someone knows how can be corrected these error?

I checked the elevation/station data of the bridge, and increase the value of the htab of the bridge, but the problem does not dissapear. I also checked the hydraulic properties table, the htab curves of the bridges and looks well as well.

Thank you,

Sara

[Anonymous]

Hello,

Did you manage to solve this problem?

I’m getting the same error

Thanks
Amelia

[Lonnie A]

Easiest fix is to find the stations its calling out in the bridge editor and move the points by 0.01.

[VirgilioG]

Hi, I bumped into the same error for my bridge and I cannot solve even by eliminating pair data. The U. analysis gives me the “negative area in subroutine convey” error between x e y stations
What could be the key of this problem? I tried to raise HW max elevation, but it doesn’t work

[jahwi_m]

Hi Lonnie

I have the same error for different bridges since I have 8. But the error message said NEGATIVE AREA IN SUBROUTINE CONVEY BETWEEN STATION 121.39 AND 126.94 but I don’t have that river stations name because I have sections every 10 meters.

So, how can I fix this problem and where. Also, I changed Htab table but I doesn’t work

[Author]

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