HELP - NQuery CGI call fails on ONE server

[James Perrins]

Hi,



I have a strange problem with NQuery and Mapserver 4.20 using CGI scripting



I have this all setup and working on a development server and on a test
deployment server (which basically mimics the public server setup - W2K
server - all patches applied)



Generally mapserver works fine on all servers - with one exception - on the
live public server (typically!) - Nquery appears to hang mapserver and
eventually  you get a timeout error.



If I use a MODE=Query - and basically query a point - all is fine - so all
the .MAP files and setup is OK (and other mapping functionality works fine)



This Call works:

============

http://testurl/scripts/mapserv420.exe?map=C:/Inetpub/ClareSpeciesRecording/t
mp/CachedMap.map&MODE=QUERY&imgext=79735 148322.5 105250
173837.5&img.x=262&img.y=192&layers=ClareOS50K
Species&QLAYER=Species&map_Species_Template=templates/Specieskey.html&SAVEQU
ERY=true&map_web_imagepath=C:\Inetpub\ClareSpeciesRecording\tmp\&map_web_ima
geurl=http://testurl/tmp/&MAPSIZE=400 400&map_QueryMap_Size=400
400&map_ClareOS50K_LABELITEM=NULL&map_Species_LABELITEM=NULL&map_querymap_st
yle=hilite



If I use MODE=NQuery and supply an IMGSHAPE then it fails



This call fails:

==========

http://testurl/scripts/mapserv420.exe?map=C:/Inetpub/ClareSpeciesRecording/t
mp/CachedMap.map&MODE=NQUERY&IMGSHAPE=81 100 234 100 234 271 81 271
&imgext=79735 148322.5 105250 173837.5&layers=ClareOS50K
Species&QLAYER=Species&map_Species_Template=templates/Specieskey.html&map_Sp
ecies_Tolerance=1&SAVEQUERY=true&map_web_imagepath=C:\Inetpub\ClareSpeciesRe
cording\tmp\&map_web_imageurl=http://testurl/tmp/&MAPSIZE=400
400&map_QueryMap_Size=400
400&map_ClareOS50K_LABELITEM=NULL&map_Species_LABELITEM=NULL&map_querymap_st
yle=hilite



Please remember - BOTH the above calls work on what is supposed to be an
IDENTICAL setup.

Although the examples here show lengthy URLs - in practice the parameters
are posted to mapserver - just in case URL length is an issue



I don't really know where to start looking for this - I presume Mapserver is
setup OK because it basically works and works for the Query mode which is
using identical data.   The call is OK as it works fine on other servers.

Can anyone think of a server / firewall / IIS setting that could cause this
to happen ?  A missing mapserver file ?



Any other suggestions ? As it's the public server that has the issue - this
is causing me some grief !



Any ideas gratefully received

Many Thanks

James









Dr James Perrins
exeGesIS SDM Ltd
Great House Barn
New Street, Talgarth
Powys LD3 0AH.
Direct Line: 01646 686650
Tel: 01874 711145
Fax: 01874 711156
Email: JamesP at esdm.co.uk

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