Applies To
	Product(s):	PondPack, SewerGEMS, CivilStorm
	Version(s):	08.11.01.56 (PondPack) 10.XX.XX.XX (other)
	Area:	Modeling
	Original Author:	Akshaya Niraula, Bentley Technical Support Group

Problem

When attempting to validate or compute a model or when computing a composite outlet with a user defined rating table, one of the following red user notifications appear:

"The maximum elevation (xft + yft) for the rating table is not the same as the headwater maximum xft. The rating table maximum elevation must equal the maximum headwater elevation."

"The minimum elevation (xft + yft) for the rating table is not the same as the headwater minimum xft. The rating table minimum elevation must equal the minimum headwater elevation."

Solution

Most likely the elevations entered in the rating table are absolute value rather than a relative. The values on the table are added to the "elevation" value that you enter in the main properties of the user defined rating table.

1) Double click the message in the User Notifications window or go to Components > Composite Outlet Structure, then select the rating table in question.
2) In User Defined Rating Curve field, click on the three dots button (ellipsis button) and update the elevation fields. Instead of being the actual elevation value, enter a relative elevation so it may look like 0, 0.25, 0.50 etc.

If this does not help, try setting the main "elevation" to zero, change the rating table elevations to be actual elevations (global edit the elevation column and add the min headwater elevation if needed), then re-type in each min and max value. meaning, click in the cell and re-enter the number, for the first and last elevation in the table, and the headwater min, max and increment value in the root properties of the composite outlet structure (if using user defined headwater elevations)

Additionally, ensure that the minimum elevation in your rating table is equal to the minimum headwater elevation (pond bottom) and that the maximum rating table elevation is equal to the maximum headwater elevation (pond top).

If the the sum of the elevations is equal to the minimum or maximum elevation, Or, adding spot elevations (root properties of the composite outlet structure) for the minimum and maximum headwater. There is a known issue related to pipe storage pond types (reference 44776). The use of spot elevations is known to help with this issue.