number of used decimals in UnitsApi must already be set when initializing App

src/App/Application.cpp

@@ -1539,6 +1539,7 @@ void Application::initApplication(void)
     ParameterGrp::handle hGrp = App::GetApplication().GetParameterGroupByPath
        ("User parameter:BaseApp/Preferences/Units");
     UnitsApi::setSchema((UnitSystem)hGrp->GetInt("UserSchema",0));
+    UnitsApi::setDecimals(hGrp->GetInt("Decimals", Base::UnitsApi::getDecimals()));
 
 #if defined (_DEBUG)
     Console().Log("Application is built with debug information\n");