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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>We’ve never supported or tested with the native driver that I am
aware of so I can’t help on that front.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I’m not sure how to tackle this since we don’t know the
conditions to reproduce the original communication link failure error.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The following MS article may yield something:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><a href="http://support.microsoft.com/kb/827422/en-us">http://support.microsoft.com/kb/827422/en-us</a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Are you using IP address or name to connect to the server? Is
the port the default 1433? I assume your SQL Server is configured to listen on
TCP/IP.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>What version of MDAC is on your server? It’s supposed to be 2.8
in 2003.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>If the timeout is really only a minute then that doesn’t match
any MapGuide timeouts that I’m aware of.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Dave<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mapguide-users-bounces@lists.osgeo.org
[mailto:mapguide-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>IElsinga@fac.bm<br>
<b>Sent:</b> Monday, July 09, 2007 7:17 AM<br>
<b>To:</b> MapGuide Users Mail List<br>
<b>Subject:</b> RE: [mapguide-users] ODBC Point features failure<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Hi Dave, </span><br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>I tried turning
off the ODBC connection pooling - this has no affect - still times out after
about 1 minute with that error message. I will experiment with the
various timeouts in mapguide and see if that helps. </span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Meanwhile,
I am using the SQL Server ODBC driver, not the Native SQL Server driver
- the latter cannot be used because of a problem identified by someone else
recently - the Native driver has a problem reading SQL Server tables. I
was thinking that the Native driver may solve this issue, but it doesn't work
at all. Here's the error: </span><br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><2007-07-06T16:37:40>
Administrator</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> Error: An
exception occurred in FDO component.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>
Invalid length 0 for column type VARCHAR, must be &gt; 0 </span><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> StackTrace:</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> -
MgFeatureServiceHandler.ProcessOperation line 83 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\feature\FeatureServiceHandler.cpp</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> -
MgOpDescribeSchemaAsXml.Execute line 107 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\feature\OpDescribeSchemaAsXml.cpp</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> -
MgServerDescribeSchema.DescribeSchema line 500 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\feature\ServerDescribeSchema.cpp</span>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'> -
MgServerDescribeSchema.ExecuteDescribeSchema line 173 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\feature\ServerDescribeSchema.cpp
An exception occurred in FDO component.</span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Invalid length
0 for column type VARCHAR, must be &gt; 0 </span><br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>This one does
seem to be a mapguide bug - there are no tables in our schema which have a
varchar length less than 10 - it seems not to be able to read the varchar type
properly. </span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Any ideas on
this one? </span><br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Thanks</span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Ian Elsinga<br>
</span><br>
<br>
<o:p></o:p></p>
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<p class=MsoNormal><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"Dave
Wilson" <dave.wilson@autodesk.com></span></b><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'> </span><br>
<span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>Sent by:
mapguide-users-bounces@lists.osgeo.org</span> <o:p></o:p></p>
<p><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>07/06/2007
12:50 PM</span> <o:p></o:p></p>
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<p class=MsoNormal align=center style='text-align:center'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>Please respond to<br>
MapGuide Users Mail List <mapguide-users@lists.osgeo.org></span><o:p></o:p></p>
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</td>
<td width="59%" valign=top style='width:59.0%;padding:.75pt .75pt .75pt .75pt'>
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<p class=MsoNormal align=right style='text-align:right'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>To</span><o:p></o:p></p>
</td>
<td valign=top style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"MapGuide
Users Mail List" <mapguide-users@lists.osgeo.org></span> <o:p></o:p></p>
</td>
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<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=right style='text-align:right'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>cc</span><o:p></o:p></p>
</td>
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<p class=MsoNormal align=right style='text-align:right'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>Subject</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>RE:
[mapguide-users] ODBC Point features failure</span><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<br>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>By
default there are a series of timeouts that are set that could be affecting
what you are seeing. Adjusting the timeouts completely depends on the behavior
of the users.</span> <br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For
example as a developer working on a map you may want to significantly increase
the timeout settings to allow connections to last for 20 min or more whereas a
user on the production server may spend no more than 5 or 10 min querying a map
so holding connections for too long is a waste or can potentially not free up
resources for other users.</span> <br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Most
of the default settings hold a session for about 20 min. So after you let your
map sit for 20 min you will have to refresh it. However below the main timeout
settings there is Connection Pooling taking place within FDO. These connections
are held for 10 min (600 seconds) and then released. You may want to try and up
this to 20 min to match the other timeouts. However in testing we have never
seen the link failure error that I am aware of.</span> <br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>A
communication link failure seems more like something external to FDO has
dropped the connection rather than FDO dropping the connection. FDO is trying
to use a connection that is no longer valid for some reason. Is there a proxy
server or firewall or router in between your MapGuide server and your database
server that could be dropping the connection? I’ve done some Google searches
and one possibility is that your DSN has connection pooling enabled and it may
be that the connection is dropped by SQLServer by the time you try to reuse it.
It’s not clear yet if it’s actually a MapGuide bug.</span> <br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The
Google searches weren’t very informative. You might try to search msdn instead.</span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dave</span>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'> </span>
<br>
<b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mapguide-users-bounces@lists.osgeo.org
[mailto:mapguide-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>IElsinga@fac.bm<b><br>
Sent:</b> Thursday, July 05, 2007 11:05 AM<b><br>
To:</b> MapGuide Users Mail List<b><br>
Subject:</b> RE: [mapguide-users] ODBC Point features failure</span> <br>
<br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
Hi Dave, thanks for the responses... </span><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
I didn't know about the error log - there are indeed error messages like the following:
</span><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
<2007-07-05T13:54:45>
fac</span> <span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'><br>
Error: Failed to stylize layer: Points</span> <span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'><br>
An exception occurred in FDO component.</span> <span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
RDBMS: [Microsoft][ODBC SQL Server
Driver]Communication link failure <br>
StackTrace:</span> <span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
- MgStylizationUtil.StylizeLayers line 923 file
c:\build_bond_area\mapguide_open_source_v1.2\build_18.1\mgdev\server\src\services\mapping\StylizationUtil.cpp
Failed to stylize layer: Points</span> <span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
An exception occurred in FDO component.</span> <span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'><br>
RDBMS: [Microsoft][ODBC SQL Server Driver]Communication link failure </span><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
Why would there be a Communications link failure? We have lots of
processes which communicate to that particular database continually. It
seems that something inside the FDO provider times out and it thinks it can no
longer access SQL Server. </span> <br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
If I restart the mapguide service and re-open the site, it initially works.
If I let it just sit there for a few minutes, without doing any zooming
or panning or clicking, then when I try to zoom after that, the points
disappear - and that error message above is in the error log. So it
seems that something in the FDO provider is timing out - it is allowing the
connection to timeout perhaps and it doesn't re-establish it? </span><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
Thanks for your help, </span><br>
<span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
Ian Elsinga</span><o:p></o:p></p>
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<p class=MsoNormal><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"Dave
Wilson" <dave.wilson@autodesk.com></span></b><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'> <br>
Sent by: mapguide-users-bounces@lists.osgeo.org</span> <o:p></o:p></p>
<p><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>07/05/2007
11:36 AM</span> <o:p></o:p></p>
<p><o:p> </o:p></p>
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padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=center style='text-align:center'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>Please respond to<br>
MapGuide Users Mail List <mapguide-users@lists.osgeo.org></span><o:p></o:p></p>
</td>
</tr>
</table>
</td>
<td width="52%" valign=top style='width:52.0%;padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal><o:p> </o:p></p>
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style='font-size:7.5pt;font-family:"Arial","sans-serif"'>To</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"MapGuide
Users Mail List" <mapguide-users@lists.osgeo.org></span> <o:p></o:p></p>
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<p class=MsoNormal align=right style='text-align:right'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>cc</span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>RE:
[mapguide-users] ODBC Point features failure</span><o:p></o:p></p>
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<o:p></o:p></p>
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<br>
<br>
<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><br>
Are there any errors logged in the server error log? It seems to me something is
causing the provider to die? Usually there is at least 1 error logged before
something like this can happen.</span> <span style='font-size:10.0pt;
font-family:"Calibri","sans-serif";color:#1F497D'><br>
</span> <span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
What coordinate system is your data in and what coordinate system is your map
in?</span> <span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
</span> <span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
Have you tried using the DWF Viewer/Autodesk Design Review? I’m curious if it’s
the data or something in the viewer behavior.</span> <span style='font-size:
10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><br>
</span> <span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
Regards,</span> <span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
Dave</span> <span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
</span> <o:p></o:p></p>
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<p class=MsoNormal><b><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"Dave
Wilson" <dave.wilson@autodesk.com></span></b><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'> <br>
Sent by: mapguide-users-bounces@lists.osgeo.org</span> <o:p></o:p></p>
<p><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>07/04/2007
06:47 PM</span> <o:p></o:p></p>
<p> <o:p></o:p></p>
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<p class=MsoNormal align=center style='text-align:center'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>Please respond to<br>
MapGuide Users Mail List <mapguide-users@lists.osgeo.org></span><o:p></o:p></p>
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>"MapGuide
Users Mail List" <mapguide-users@lists.osgeo.org></span> <o:p></o:p></p>
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<td style='padding:.75pt .75pt .75pt .75pt'>
<p class=MsoNormal align=right style='text-align:right'><span
style='font-size:7.5pt;font-family:"Arial","sans-serif"'>cc</span><o:p></o:p></p>
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<p class=MsoNormal align=right style='text-align:right'><span
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<p class=MsoNormal><span style='font-size:7.5pt;font-family:"Arial","sans-serif"'>RE:
[mapguide-users] ODBC Point features failure</span><o:p></o:p></p>
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<o:p></o:p></p>
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<p><br>
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<span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><br>
<br>
<br>
In house testing with a feature source containing almost 10,000 features
appears to work fine.</span> <span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
<br>
How much memory on your system? What is the OS? Do you have properties selected
on your layer? How many other layers are in your map?</span> <span
style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><br>
<br>
Regards,</span> <span style='font-size:10.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><br>
Dave</span> <b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'><br>
<br>
From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
mapguide-users-bounces@lists.osgeo.org
[mailto:mapguide-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>IElsinga@fac.bm<b><br>
Sent:</b> Wednesday, July 04, 2007 10:33 AM<b><br>
To:</b> mapguide-users@lists.osgeo.org<b><br>
Subject:</b> [mapguide-users] ODBC Point features failure</span> <span
style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
<br>
<br>
I am using MGOS 1.2 RC2 and am experiencing a problem with an ODBC connected to
SQL Server point source. Points are displayed initially, but then
eventually they are not displayed any longer. Opening a new web browser
does not help. The only way I can get them to come back is to restart the
MapGuide windows service - then the points will come back - for a few minutes
of interaction. </span> <span style='font-size:10.0pt;font-family:"Arial","sans-serif"'><br>
<br>
I am bringing back 1000 points from a SQL Server database. This
behaviour was the same in 1.2 RC1. <br>
<br>
This will obviously make mapguide unusable for our purposes - is there a
problem with the ODBC FDO? </span> <span style='font-size:10.0pt;
font-family:"Arial","sans-serif"'><br>
<br>
I will be grateful for any assistance! </span> <span style='font-size:
10.0pt;font-family:"Arial","sans-serif"'><br>
<br>
<br>
Ian Elsinga</span><span style='font-size:10.0pt;font-family:"Courier New"'>_______________________________________________<br>
mapguide-users mailing list<br>
mapguide-users@lists.osgeo.org<br>
http://lists.osgeo.org/mailman/listinfo/mapguide-users<br>
_______________________________________________<br>
mapguide-users mailing list<br>
mapguide-users@lists.osgeo.org<br>
http://lists.osgeo.org/mailman/listinfo/mapguide-users_______________________________________________<br>
mapguide-users mailing list<br>
mapguide-users@lists.osgeo.org<br>
http://lists.osgeo.org/mailman/listinfo/mapguide-users<tt>_______________________________________________</tt><br>
<tt>mapguide-users mailing list</tt><br>
<tt>mapguide-users@lists.osgeo.org</tt><br>
<tt>http://lists.osgeo.org/mailman/listinfo/mapguide-users</tt></span><o:p></o:p></p>
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