[las_users] las_users: vector plots with las v7.0.3

[Martin Schmidt <martin.schmidt@xxxxxxxxxxxxxxxxx>]

Hi,
I am using las version 7.0.3. I configure my xml-files to describe data 
sets and variables with addXML.
This works fine so far. However, the method to add vector variables like 
wind speed does not work. My
xml-file looks like following:

   <variables>
....
     <TAU_X-id-c169a195e9 name="i-directed wind stress" units="N/m^2" 
url="/u/las/las-daten/atlantic_genus_4/tau_x.nc#TAU_X">
       <link 
match="/lasdata/grids/grid-XU_OCEAN-YU_OCEAN-TIME3-id-c169a195e9" />
     </TAU_X-id-c169a195e9>
     <TAU_Y-id-3543d72912 name="j-directed wind stress" units="N/m^2" 
url="/u/las/las-daten/atlantic_genus_4/tau_y.nc#TAU_Y">
       <link 
match="/lasdata/grids/grid-XU_OCEAN-YU_OCEAN-TIME3-id-c169a195e9" />
     </TAU_Y-id-3543d72912>    
   </variables>
   <composite>
    <wind_stress_vectors name="wind stress vectors">
     <properties>
       <ui>
        <default>file:ui.xml#VecVariable </default>
       </ui>
     </properties>
     <link match="/lasdata/datasets/variables/TAU_X-id-c169a195e9"/>
     <link match="/lasdata/datasets/variables/TAU_Y-id-3543d72912"/>
    </wind_stress_vectors>
   </composite>

tau_x and tau_y are shown, but the vectors plot is not  offered in the 
list of variables.
The <composite> section seems to be read when starting the server. Any 
error in the path to the data lets the
server fail completely.

I did not find any server (version > 7) in the web, that displays 
vectors. Does it work at all?
Any idea, what I am doing wrong?

Greetings,
Martin Schmidt