Issue Description
You created an associative Zone Label in Archicad, and the measurement units are missing from the displayed area, volume, etc.
Solution
This can be easily fixed by adjusting the Zone's Label settings.
1. Select the Label missing measurement units.
2. Right-click on it and choose Label Selection Settings to open the Label Settings Dialogue.
3. Go to Symbol Label Custom Settings > General Settings.
4. Check the box of the option Show Units.
5. Click OK to save the changes and the measurement units appear in the label.
TIP: You can set the units to be defined by Project Preferences or any other unit you want to display.