[Geoserver-users] Dynamic url's is not working for external graphics in SLD

I red in forum related to this issue topic.Many guys were posting same issues.
But I can’t understant what is the solution for this?
I spend lot of time in this issue.

I am using GeoExt 0.7 and Geoserver 2.2.2.
I created SLD and I applied this sld in my layer.
Layer is showing properly on map but “legend” is not showing on map.
It is throwing “ERROR [lite.StyledShapePainter] - ShapePainter has been asked to paint a null style!!”.
Note:
${Ikon} vaues dynamically getting from WMS layer attribute.




image/png

16.0
ogc:PropertyNameRiktning</ogc:PropertyName>

What I want to do to show the legend on map?

Thanks,
Manog