Problem

When attempting to compute or validate a model, the following red user notification appears, preventing the model from computing:

"The valve characteristics curve must contain at least 2 entries, including entries at (0, 100%), and (100, 0%)."

"Valve characteristics curve contains illegal values."

Solution

This can happen if the table of relative closure vs. relative discharge coefficient does not start with 0%, 100% and end with 100%, 0%. Right click on the column header, choose "units and formatting", and add additional decimal precision so that you ensure that the values are exactly 0 and 100%.

This can also happen if the unit is not set correctly. Units can either be percentage (%) or unitless. When set to %, the table is expected to range from 0% to 100%, but when the unit is set to unitless, it is expected to range from 0 to 1.0. So, if you had the unit set to unitless and entered values ranging from 0 to 100, the "100" would be interpreted as 10,000%. To fix this, right click on the column header (for both), choose "global edit" and globally divide by 100.

See Also