[Qgis-user] QGIS Server GetMap request displays data but QGIS Web Client does not

[cdp]

Hi all,

Started having a strange issue out of nowhere on a relatively stable
installation of QGIS Server and Web Client.  The installation is old,
however it worked perfectly up until recently.  

Problem:
Layer data visible when doing a Get Map request directly to the QGIS Server
is not visible when accessing the qgis project via the web client.  As an
example the following links take you to a test qgs project.

QGIS server get map: 
http://gis.idn12.com/qgis/qgis_mapserv.fcgi?map=c:/projects/t4.qgs&LAYERS=VIEWS_2,project1,site,project2&FORMAT=image/png&DPI=150&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG:3005&BBOX=0,400000,2100000,1700000&WIDTH=1200&HEIGHT=1200

QGIS web client (give it a moment to load..the imagery layer 'VIEWS_2' is
quite large)
http://gis.idn12.com/qgiswebclient.html?map=C:/projects/t4.qgs&format=image/png&startExtent=0,400000,2100000,1700000

There are no scale dependent visability restrictions and all data is in the
same coordinate system.

The issue is occurring sporadically across all of our existing .qgs projects
(which all previously worked perfectly)

Totally stumped!  Any ideas where to start?  Would I be correct in saying
this is a web client issue given that the GetMap request works fine?

thanks in advance!
C



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