I put all layers on  tilecache.cfg :<br><br>[Layer1]<br>...<br>[Layer1Label]<br>...<br>[Layer2]<br>...<br><br>When I &quot;Turn ON&quot; two or more sublayer together I got that error:<br><br>An error occurred: Could not combine images: Is it possible that some layers are not 
8-bit transparent images? <br><br>(Error was: bad transparency mask)
  File &quot;C:\inetpub\wwwroot\Openlayer\TileCache\Service.py&quot;, line 323, in cgiHandler
    format, image = service.dispatchRequest( params, path_info, req_method, host )
  File &quot;C:\inetpub\wwwroot\Openlayer\TileCache\Service.py&quot;, line 234, in dispatchRequest
    raise Exception(&quot;Could not combine images: Is it possible that some layers are not \n8-bit transparent images? \n(Error was: %s)&quot; % E)


<br><br>Cache miss: -180.0,-90.0,0.0,90.0, Tile: x: 0, y: 0, z: 0, time: 0.828000068665
Cache miss: -180.0,-90.0,0.0,90.0, Tile: x: 0, y: 0, z: 0, time: 0.135999917984<br><br>Any idea?<br><br>Thanks<br><br><div class="gmail_quote">On Tue, Apr 6, 2010 at 4:51 PM, Paul james <span dir="ltr">&lt;<a href="mailto:pauljame@gmail.com">pauljame@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Hello ...<br><br><br>I´m started with Tilecache today, and its working fine with single layers :<br>
 <br>tilecache.cfg :<br><br>[Layer1]<br>type=WMS<br>url=<a href="http://localhost/cgi-bin/mapserv.exe?map=map.map&amp;" target="_blank">http://localhost/cgi-bin/mapserv.exe?map=map.map&amp;</a><br>
extension=png<br><br>How can I configure tilecache.cfg to use with Geoext Sublayers like that one:<br><br><br>    var _layerx = new OpenLayers.Layer.WMS(&quot;Test&quot;, _mapfile,<br>        {<br>            &quot;LAYERS&quot;: [&#39;Test1,Test1Label&#39;,<br>

                           &#39;Test2,Test2Label&#39;,             <br>                          &#39;Test3,Test3Label&#39;],<br>            transparent: true,<br>            format: &quot;image/png&quot;<br>        }, {<br>

            isBaseLayer: false,<br>            buffer: 0,<br>            visibility: true<br>        });<br><br><br>Thanks<br>
</blockquote></div><br>