Most vrtool calculations require two datasets loaded:winds
. The image you sent makes it clear
that winds are loaded, so the polar data is probably missing.
Go to the tab "Winds" and unfold the "Polars database" panel.
1. Choose a file (either a simple polars *.CSV or a multisail polars *.XML).
2. Important: click load
3. In the "Selected" option, choose the active dataset.
(again either the CSV or XML)
To check if the polars are properly loaded, check the
polar chart icon in the Winds panel. Polar charts should
appear in the chart.
Note that you must do that only once for each regatta.
The settings will be remembered next time you start vrtool.