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<h3 align="left">Troubleshooting FAQ</h3>
<p>This document outlines common problems and solutions for troubleshooting the
COM+ SDK Samples.</p>
<p>The following categories are provided in this FAQ</p>
<ul>
<li><a href="#IIS">IIS</a></li>
<li><a href="#COM+">COM+</a></li>
<li><a href="#MSMQ">MSMQ</a></li>
<li><a href="#Component Services">Component Services</a></li>
<li><a href="#Visual Basic Build Issues">Visual Basic Build Issues</a></li>
<li><a href="#&nbsp;Visual C++ Build Issues">Visual C++ Build Issues</a></li>
</ul>
<h4><a name="IIS">IIS</a> Issues</h4>
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4"><a name="IISBindings">Q</a>:</font></b></td>
<td width="96%">When I try to start my website I get a message saying
&quot;The service could not be started because it is not correctly
configured.&nbsp; Make sure that its server bindings do not conflict with
other sites running on the same machine.&quot;</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">IIS can have only one site bound to a given port as the
default website.&nbsp; There are various mechanisms for hosting multiple
websites on a single computer, but for the purposes of the sample
applications, it is best to stop the default website and then you will be
able to start the sample site. </td>
</tr>
</table>
<h4><a name="COM+">COM+</a> Issues</h4>
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4"><a name="CompSvcsRightClickMenu">Q</a>:</font></b></td>
<td width="96%">When I create a subscriber filter, no event notifications
are getting through</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%"> Filter expressions are not
validated when you enter them in the subscription property sheet and no error is
returned to the publisher if you have an invalid expression, invalid expressions
simply fail to pass the filter.&nbsp; Refer to the table below for common
problems with event filters.</td>
</tr>
</table>
&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">When I try to send the message using Queued Components I get
error 70 &quot;Permission Denied&quot;</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">You must disable security on the COM+ application when
running MSMQ in workgroup mode.&nbsp;&nbsp;&nbsp; For more information see
<a href="http://msdn.microsoft.com/library/default.asp?URL=/library/psdk/cossdk/pgservices_queuedcomponents_9skz.htm" target="_top">Development
Constraints</a>.
<p>You change change the MSMQ mode (Workgroup or Directory Services) using
the <a href="../Tools/MSMQ%20Mode%20Tool/MSMQModeTool.exe">MSMQ Mode Tool</a>
(Sample code is included)</p>
</td>
</tr>
</table>
&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">When I try to use Queued Components nothing seems to work -
I get a lot of strange errors showing up in the Application Event log from
COM+</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">This can happen when your registry is cluttered with old
references to non existent DLL's with the same name.&nbsp; You may want to
download and run the <a href="http://support.microsoft.com/support/kb/articles/Q147/7/69.asp?RLD=30" target="_top">Regclean</a>
tool to correct this.
</td>
</tr>
</table>
&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">When I use Queued Components, my app appears to work
correctly but no messages end up in the queue.&nbsp; Then when I check the
event log I see error messages from COM+.&nbsp; How come it didn't report
an error to my application?</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">When calling a QC, a special recorder proxy is
created.&nbsp; All calls made to the interface are recorded by this proxy
until you release the interface.&nbsp; Once you release the interface, the
recorder attempts to create an MSMQ message with the recorded data.&nbsp;
If there is a failure in creating this message, there is no way to return
an error to your program at that point because you have no released the
interface.&nbsp; The only thing the recorder can do is write the error
message to the error log.
</td>
</tr>
</table>
&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">When I try to use Queued Components I get Run-time error
'-214368000 (80110600)';<br>
Only COM+ applications marked &quot;queued&quot; can be created using the
&quot;queue&quot; moniker.</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">This happens when you failed to mark the host application as
queued.&nbsp;&nbsp;
</td>
</tr>
</table>
&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">When I ran my application using QC no messages were placed
in the queue.&nbsp; When I checked the error log I see an error message
that says &quot;A cryptographic function failed&quot;.&nbsp; How do I fix
this?</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">You need to renew your internal certificate.&nbsp;&nbsp;
<p>Open the MSMQ applet in control panel and click on the security
tab.&nbsp; Then click on <b>Renew Internal Certificate...</b>
</td>
</tr>
</table>
&nbsp;&nbsp;&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">When I mark an application as Queued and click OK, I get a
Catalog Error
<blockquote>
<p>An error occurred while processing the last operation.<br>
Error code C00E0025<br>
The event log may contain additional troubleshooting information.</p>
</blockquote>
<p>The error log says&nbsp;</p>
<blockquote>
<p>The run-time environment has detected the absence of a critical
resource and has caused the process that hosted it to terminate.<br>
MQCreateQueue</p>
</blockquote>
</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">Error C00E0025 is MQ_ERROR_ACCESS_DENIED which means that
there was a security violation reported by MSMQ when COM+ attempted to
create message queues for the application.
<p>The most likely cause for this is that MSMQ is running in directory
services mode and the user account does not have permission to create a
public queue.&nbsp; There are two solutions, one is to grant the user
permissions, the other is to change MSMQ to workgroup mode using
the <a href="../Tools/MSMQ%20Mode%20Tool/MSMQModeTool.exe">MSMQ Mode Tool</a>
&nbsp;
</td>
</tr>
</table>
&nbsp;
<h6>Filtering Problems and Resolutions</h6>
<table border="1" width="100%">
<tr>
<td width="29%"><b>Possible Cause</b></td>
<td width="71%"><b>What to check for</b></td>
</tr>
<tr>
<td width="29%">Parameter name mismatch</td>
<td width="71%">The name of the parameter must match exactly (including
case)</td>
</tr>
<tr>
<td width="29%">Invalid operator</td>
<td width="71%">The expression did not use a supported operators (=, ==, !,
!=, ~, ~=, &lt;&gt;)</td>
</tr>
<tr>
<td width="29%">String parameter value not quoted</td>
<td width="71%">You must quote string parameter values</td>
</tr>
<tr>
<td width="29%">Invalid use of logical operators</td>
<td width="71%">When combining terms with a logical operator, you must
include the parameter name in both sides of the expression as in Message =
&quot;Hello World!&quot; OR Message = &quot;Hi World!&quot; instead of
Message = &quot;Hello World!&quot; OR &quot;Hi World!&quot;</td>
</tr>
</table>
<h4><a name="MSMQ">MSMQ</a> Issues</h4>
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">How can I tell if MSMQ is installed or running?</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">You can check the Computer Management console.
<p>To determine if MSMQ is installed</p>
<ol>
<li>Start <b>Computer Management</b> from the Start menu under <b>Programs
/ Administrative Tools / Computer Management.</b></li>
<li>Expand the <b>Services and Applications</b> node under <b>Computer
Management (local).</b></li>
<li>If <b>MSMQ</b> is installed you will see a node under <b>Services
and Applications.</b></li>
</ol>
<p>To determine is MSMQ is running</p>
<ol>
<li>Click on the <b>Services</b> node under <b>Services and
Applications.</b></li>
<li>Select <b>Message Queuing</b> in the list of services</li>
<li>If MSMQ is running, the toolbar will have the start button (&gt;)
grayed out and the stop button enabled.&nbsp; If it is not running the
start button will be enabled and the stop button will be disabled.</li>
</ol>
</td>
</tr>
</table>
&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">How do I install MSMQ?</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">To install MSMQ:
<ol>
<li>Start the <b>Add/Remove Programs</b> control panel applet.</li>
<li>Select <b>Add/Remove Windows</b> Components.</li>
<li>Check the box for <b>Message Queuing Services</b>.</li>
<li>Click Next.</li>
<li>For developer testing purposes you generally want to have a Message Queuing
Server rather than a dependent client.</li>
</ol>
</td>
</tr>
</table>
<h4><a name="Component Services">Component Services</a> Issues</h4>
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4"><a name="CompSvcsRightClickMenu">Q</a>:</font></b></td>
<td width="96%">When I right click on an item in the component services
explorer tree, the menu doesn't have the choice I want.&nbsp; I see a New
option but not the New / Component or New / Subscription etc.</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">The Microsoft Management Console (MMC) requires you to first
select a node by clicking on it (to set the context correctly) prior to
right clicking on it.&nbsp; If the context is not correct, you will get
the right click menu from whatever node is currently selected.</td>
</tr>
</table>
&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4"><a name="CompSvcsRightClickMenu">Q</a>:</font></b></td>
<td width="96%">When I try to shut down&nbsp;my COM+ application it doesn't
shut down</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">There are certain conditions where the presence of the VB
IDE interferes with shutdown of the COM+ application.&nbsp; Exit VB and
then try to shut down the application, it should shut down normally.</td>
</tr>
</table>
&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4"><a name="CompSvcsRightClickMenu">Q</a>:</font></b></td>
<td width="96%">When I start my VB application, the ball does not spin and
it looks like it is not running, though my code works as expected.</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">This is a known bug when security for your application is
disabled.</td>
</tr>
</table>
&nbsp;
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">When I right click to shut down the application, it does not
shut down.</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">This can happen when VB is running on the same computer
because VB is holding a reference to the module.&nbsp; Close VB and then
try to shutdown the application.</td>
</tr>
</table>
<h4>&nbsp;<a name="Visual Basic Build Issues">Visual Basic Build Issues</a></h4>
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4"><a name="VBBrokenRef">Q</a>:</font></b></td>
<td width="96%">When I try to compile the components I get a compile error
&quot;Can't find project or library&quot;</td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">When you see this error, Visual Basic is telling you that a
reference to another project is no longer valid or missing.&nbsp; VB will
highlight the class that it is trying to compile.&nbsp; The most likely
cause of this error with sample applications is that you did not build
them in the correct order.&nbsp;&nbsp; For more information see <a href="http://msdn.microsoft.com/library/default.asp?URL=/library/devprods/vs6/vbasic/vbenlr98/vamsgbrokenlibref.htm" target="_top">Can't
find project or library</a> on MSDN. </td>
</tr>
</table>
<h4><a name="&nbsp;Visual C++ Build Issues">&nbsp;Visual C++&nbsp; Build Issues</a></h4>
<table border="1" width="100%">
<tr>
<td width="4%">
<p align="center"><b><font size="4">Q:</font></b></td>
<td width="96%">When building the C++ components I get an error <b>LINK :
fatal error LNK1104: cannot open file &quot;comsvcs.lib&quot;</b></td>
</tr>
<tr>
<td width="4%">
<p align="center"><b><font size="4">A:</font></b></td>
<td width="96%">These samples require the latest release of the <a href="http://msdn.microsoft.com/downloads/sdks/platform/platform.asp" target="_top">Platform
SDK</a>.</td>
</tr>
</table>
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