Site definition giving http error: 0

I just spent a whole night trying to do what should be a simple task: binding the sql data to a table I made. It's amazing: I spent A LOT of money on CS4 and it doesn't work as does FileZilla.
I'm taking a course in Dreamweaver and have to complete an assignment using Dreamweaver. Can anyone tell me what needs to be tweaked in the software. The login, root directory, password and URL all work with Filezilla. Hostingrails insists that it's a problem with the site definition in DW.
Help!

You don't say which server model you're using, but there are instructions for getting CS4 running with PHP here: http://www.adobe.com/devnet/dreamweaver/articles/setting_up_php.html.

Similar Messages

Site Definition with Custom List Intance with Custom fields

How to create VS 2012 > Site Definition with Custom List Instance with Custom fields?
<site>
<list>
<field>

Hi Sunil,
it is the same way we create in VS 2010.
Add a new empty SP project in VS2012 and then add, site, list and fields as per your requirement.
Here are few references-
Creating SharePoint 2010 Site Definitions in Visual Studio 2010
http://msdn.microsoft.com/en-us/library/gg276356(v=office.14).aspx
Creating SharePoint 2010 List Definitions in Visual Studio 2010
http://msdn.microsoft.com/en-us/library/gg276355(v=office.14).aspx
Walkthrough: Create a Basic Site Definition Project
http://msdn.microsoft.com/en-us/library/ee231583.aspx
and I normally create a blank site with all required configuration and then create, import the template to hand craft the list and fields. this would minimize errors.
see the below blog on this topic
http://blogs.msdn.com/b/sambetts/archive/2013/10/17/creating-a-clean-visual-studio-solution-from-a-sharepoint-2013-site-template.aspx
Hope this helps!
Ram - SharePoint Architect
Blog - SharePointDeveloper.in
Please vote or mark your question answered, if the reply helps you

Remote and Testing Server Site Definitions

I am confused about what information I should put in my
remote site definition info and testing server FTC Host directory
text boxes. My host placed 3 directories: database, log, and www on
my server and Dreamweaver placed two directories, Connections and
_mmServerScripts in the same directory as the above 3. I have
placed all of my site files, including my home page and folders in
the www directory and my Access database in the database directory.
Dreamweaver placed the connection info in the Connections folder an
d _mmServerScripts in the same directory.
In order to construct my local site to match the remote site,
I created a www folder on my local site and placed all of my HTML
files and supporting folders in it.
From various Adobe Tech Notes I have read, I was led to
believe my FTP host directory
Should be www/. However, when I do this and create a new web
page on my local site and upload it to my remote site, Dreamweaver
creates a new www directory inside of the one my host created on
the remote site and uploads the file to it instead of placing it in
the www directory my host created. Also, when I use F12 to test my
page in my browser I get a 404 page not found because Dreamweaver
placed a www in the page URL that shouldn’t be there and
after I remove it I’m able to see my page in my browser. My
URL prefix on my testing server site definition is:
http://I.P.number.html.
What am I not doing right?
Should I use www/ as my FTP host directory or leave it blank?
Also, what should my URL prefix be?
Thanks for your help.

What you need to do is set up so that in the remote server
you point to the
www level on the server, and don't replicate this locally.
Paul Whitham
Certified Dreamweaver MX2004 Professional
Adobe Community Expert - Dreamweaver
Valleybiz Internet Design
www.valleybiz.net
"Jim_Moore" <[email protected]> wrote in
message
news:[email protected]...
>I am confused about what information I should put in my
remote site
>definition
> info and testing server FTC Host directory text boxes.
My host placed 3
> directories: database, log, and www on my server and
Dreamweaver placed
> two
> directories, Connections and _mmServerScripts in the
same directory as the
> above 3. I have placed all of my site files, including
my home page and
> folders
> in the www directory and my Access database in the
database directory.
> Dreamweaver placed the connection info in the
Connections folder an d
> _mmServerScripts in the same directory.
>
> In order to construct my local site to match the remote
site, I created a
> www
> folder on my local site and placed all of my HTML files
and supporting
> folders
> in it.
>
> From various Adobe Tech Notes I have read, I was led to
believe my FTP
> host
> directory
> Should be www/. However, when I do this and create a new
web page on my
> local
> site and upload it to my remote site, Dreamweaver
creates a new www
> directory
> inside of the one my host created on the remote site and
uploads the file
> to it
> instead of placing it in the www directory my host
created. Also, when I
> use
> F12 to test my page in my browser I get a 404 page not
found because
> Dreamweaver placed a www in the page URL that shouldn?t
be there and after
> I
> remove it I?m able to see my page in my browser. My URL
prefix on my
> testing
> server site definition is:
http://I.P.number.html.
>
> What am I not doing right?
> Should I use www/ as my FTP host directory or leave it
blank?
> Also, what should my URL prefix be?
>
> Thanks for your help.
>
>

Preview versus Real View Not the Same, Site Definition Errors - Dreamweaver CS4

I am having trouble working on sites where it seems that Dreamweaver wants me to specify different file locations for various "includes" depending on whether I want to view the site as a preview (F12) vs. on a local test server vs. on the real website server. Note I am using Dreamweaver CS4 (ver. 10) on Windows, my local test server is Apache running via an Xampp installation on Windows, and my production server is also Apache, running at Hostgator. I am building a fairly basic html site using SSI via SHTML files, rather than PHP or a more sophisticated method. Here is what seems to be happening:
1. In my index.shtml file I call, for example, a subheader file called "header-nosub-menu.inc.htm." I have my site definitions set to "relative to document root." Using the insert -> SSI command, Dreamweaver links to the file with the following: My first problem is that, as specified, the subheader.menu.inc.htm file is not found and the preview gives me an error. I get the same error if i try to display the file on my local test server (http://localhost/domainname). However, if I upload the file to my production server, it seems to work fine. If I change the include command to: #include virtual="./includes/subheader.menu.inc.htm," by manually inserting the "./" to change the directory reference, then the file seems to work in all three situations Which is the correct directory specification, and why is Dreamweaver not generating it automatically?
While I can make the manual changes in the directory specifications, I am concerned that if Dreamweaver is making an error in this instance, it may generate more serious problems that are harder to find later.
2. The second issue seems to involve the Site Definition file configuration.I get an error message when I set up my site definition in what seems to be the correct way, specifically, using the following specifications:
Local Root folder: "C:\htdocs\domainname-dev\"
http address: "http://www.domainname/"
testing server folder: "C:\htdocs\domainname-dev"
url prefix: "http://localhost/domainname-dev"
The error message is: "The site url prefix for the testing server does not match the site url prefix specified in the http address for the site."
However, when I change the testing server url prefix to one that does not yield an error message ("http://localhost") I then have problems with the preview (F12) display. Specifically, instead of a preview request generating the following url: "http://localhost/domainname-dev/TMPm393xnclqu.shtml" I find that it generates the following: "http://localhost/TMPm393xnclqu.shtml" The so called incorrect definition seems to be the correct one, but why is Dreamweaver not recognizing it as such? Am I making a error somewhere else in my configuration?
I would appreciate any assistance that anyone here can provide,
Thanks,
http://localhost/

except for the Apache virtual host configuration, which I do not see a need for
I wasn't suggesting that you use virtual hosts (although I have defined about 50 virtual hosts on my own development machine). I was trying to understand the url you listed:
http://www.domainname/
Without a virtual host definition, that would have no meaning and could not point to anything, unless you simply were leaving off the TLD in the example. (.com, .net, etc)
I often use the PHP $_SERVER superglobal to define paths and handle differences between the development environment and the remote server environment. Examples:
DOCUMENT_ROOT: D:/ZendServer/Apache2/htdocs/website/ranch (machine path)
REQUEST_URI: /topic/calendar (url parameters)
SCRIPT_NAME: index.php
HTTP_REFERER: (the url of the script preceding the current script)
HTTP_HOST: (this is the domain name. It is very useful for distinguishing between the local and remote environments)
COMPLETE EXAMPLE:
echo "<a class='noPrint' href='".$_SERVER['HTTP_REFERER']."'>RETURN TO PREVIOUS PAGE</a>";

Site definition error

I've setup a test server environment using xampp. I downloaded the existing site I want to work with. It's made up of PHP scripts, html and some text files, no database connections. If I put all the files in the htdocs directory the site runs fine, when viewed through a browser. However when I define this location in Dreamweaver I always get the error "Dynamically-related files could not be resolved because the site definition is not correct for this server."
Site name: testsite
Local Site Folder: C:\xampp\htdocs
Server name: testserver
connect using: Local/Network
Server folder: C:\xampp\htdocs\
Web URL: http://localhost
Advanced
Server Model PHP MySQL
I've tried many setups, including a sub directory in htdocs, but then the site does not run, and I still get the same Dreamweaver error about incorrect site definition. I can create other test sites, create simple PHP scirpts, and they work no errors.
In the present setup the site runs, so why do I keep getting the same error message in Dreamweaver?

Exactly right Murray. Thanks.
To clarify, I have a PHP site configured to use a server-side include for common <head> tag data. The <head> tags contain links to scripts and CSS files that are common to all site pages. Since its in an include file called head.php, I can conveniently modify content in my <head> tags on all site pages at once by editing just one file. Server-side includes are very efficient this way.
However, because of this configuration, DW cannot reconcile links inside that file and continues to throw the annoying "dynamically-related files could not be resolved because the site definition is not correct for this server" message. In fact, my site definition is correct and the site works perfectly. So I ignore the message.
I'm guessing you have a similarly configured PHP site.
Nancy O.

SharePoint public facing site does not open in sharepoint designer after giving http redirect in IIS

I have a public facing sharepoint site
We gave http redirect in IIS due to which I am unable to open the site in SharePoint Designer and gives error message site not found in webserver.
If i revert back the settings (remove the http redirect link) i m able to open the site in designer.Please let me know how can I resolve the issue in opening site in SharePoint designer after http redirect setting done in IIS

Looks like an AAM issue. What URL of the site you are trying to open with designer and what are your AAM settings?
Ronald Bruinsma - Independent SharePoint Consultant - iDocs.info - The Netherlands
Ronald I got the same issue here is my info:
sharepoint site: http://<servername>/sites/mycompany
<ServerIP>
Default
http://servername
<Servername>
Default
http://servername
http://contoso.mycompany.com
Extranet
http://contoso.mycompany.com
In IIS webapp 80. http redirect:
redirect requests to this destination is checked: http://contoso.mycompany.com/sites/mycompany
can you help me? thanks

When i send a test message throw the RWB for Http receiver adapter it is giving the error "Error in processing caused by: com.sap.aii.adapter.http.api.HttpAdapterException: ERROR_SOCKET_TIMEOUT, Read timed out"

when i send a test message throw the RWB for Http receiver adapter it is giving the error "Error in processing caused by: com.sap.aii.adapter.http.api.HttpAdapterException: ERROR_SOCKET_TIMEOUT, Read timed out"

Hi, Michal
I have read your Weblog. It makes sense to me. Thanks a lot for your help! However, I still have some questions and listed them as following. Could you please help to answer them?
Q1: I am new to SAP-XI. So I have no idea about TCODE-SXMB_ADM. Could you introduce more details about it?
Q2: The XI system I am using is running on SAP-ICC's machine. The tools I can use are:
1.Builder for Integration Repository
2.Builder for Integration Configuration
3.System Landscape Directory
4.Runtime Workbench
5.Administration System (for Repository, Directory, Runtime)
Please note that I do not have a complete control on this SAP-XI. Do you think whether or not I can set the timeout parameter by following the instructions provided in your Weblog?
For more details about my SAP-XI, please access the following Web page:
http://iccxi.sap.com:58000/rep/support/admin/index.html
Q3: The following messages are extracted from the SAP-XI. Wish they are hepful to solving my problem.
2006-06-19 05:12:16 Success The message was successfully received by the messaging system. Profile: XI URL: http://iccxi.sap.com:58000/MessagingSystem/receive/AFW/XI
2006-06-19 05:12:16 Success Using connection AFW. Trying to put the message into the request queue.
2006-06-19 05:12:16 Success Message successfully put into the queue.
2006-06-19 05:12:16 Success The message was successfully retrieved from the request queue.
2006-06-19 05:12:16 Success The message status set to DLNG.
2006-06-19 05:12:16 Success Delivering to channel: ValidationRequestHandlerServiceChannel
2006-06-19 05:12:16 Success SOAP: request message entering the adapter
2006-06-19 05:12:37 Success SOAP: call failed
2006-06-19 05:12:37 Error SOAP: error occured: java.net.ConnectException: Connection timed out: connect
2006-06-19 05:12:37 Error Exception caught by adapter framework: Connection timed out: connect
Thanks
Menghua Li

Uh oh. Google confirms it's giving HTTPS sites higher search rankings. What do we do?

This recent change in the Google algorithm is bad for our clients because BC's solution for HTTPS requires the use of https://companyname.worldsecuresystems.com – which my clients would NEVER want to make their default URL.
So BC, what's your next move? If we can't install our own SSL certs, our clients will be penalised by Google.
That will make start to make BC harder to sell, especially to those who value their Google rankings.
Ref: Google confirms it's giving HTTPS sites higher search rankings | ZDNet

Hi there Matt,
There are several threads here and on Linked in about this already.
I will quote one of the key things Google said that people have glossed over or omitted:
"For now it's only a very lightweight signal - affecting fewer than 1% of global queries, and carrying less weight than other signals such as high-quality content - while we give webmasters time to switch to HTTPS," Google's Zineb Ait Bahajji and Gary Illyes said in the blog post.
"But over time, we may decide to strengthen it, because we'd like to encourage all website owners to switch from HTTP to HTTPS to keep everyone safe on the web."
So right now - Its not a factor that will ruin your ranking.
Note how the quote has words like "MAY" decide etc.

I need Photoshop CS3 for mac download.. Adobe site says: HTTP ERROR: 404 /support/downloads/dlm/main.jsp RequestURI=/support/downloads/dlm/main.jsp

i need cs3 photoshop...
HTTP ERROR: 404 /support/downloads/dlm/main.jsp
RequestURI=/support/downloads/dlm/main.jsp

http://helpx.adobe.com/creative-suite/kb/cs3-product-downloads.html
Gene

Create a Site Definition file with Visual Web part in Visual Studio

I tried to create a site definition file in Visual Studio 2013 and SharePoint 2013 by following the MSDN tutorial:
Walkthrough: Create a Basic Site Definition Project. Near the end, I added a virtual web part control to the site definition and registered MyWebPartControls in the site definition's default ASPX page as written in the MSDN tutorial:
Unfortunately, IntelliSense doesn't show any MyWebPartControls: tags, and VisualWebPart1 is highlighted with a warning “Element 'SMWebPart3' is not a known element. This can
occur if there is a compilation error in the Web site, or the web.config file is missing.”
Since it’s a warning, I went ahead to build and deploy the solution. However, when I used the site definition template to create a subsite, it returned a parser error:
Unknown server tag 'MyWebPartControls:TestSiteDef1.VisualWebPart1'
I spent half day researching and debugging, and finally solved the problem. The issue is on the registration line:
<%@ Register Tagprefix="MyWebPartControls" Namespace="TestSiteDef.VisualWebPart1" Assembly="$SharePoint.Project.AssemblyFullName$" %>
The $SharePoint.Project.AssemblyFullName$ is a replaceable parameter to provide values for SharePoint solution items whose actual values are not known at design time. Unfortunately, it does not find the right assembly name during the deployment. It should
be replaced by the Assembly’s Strong Name. Here is how I fixed the problem step by step:
In Solution Explorer, open the package node and double click Package.package
Click Manifest tab in the Package.package.
Copy the full assembly name in the package’s manifest. It may be similar like this:
Assembly="TestSiteDef,
Version=1.0.0.0, Culture=neutral, PublicKeyToken=a300f1f2da8ae976"
Back to the site definition’s default.aspx page, replace the
Assembly="$SharePoint.Project.AssemblyFullName"
in the registration line with the copied text:
Assembly="TestSiteDef,
Version=1.0.0.0, Culture=neutral, PublicKeyToken=a300f1f2da8ae976"
Change the Namespace from
Namespace="TestSiteDef.VisualWebPart1"
to
Namespace="TestSiteDef".
The line to register the web part in a site definition file will look like this:
<%@
Register
Tagprefix="MyWebPartControls"
Namespace="TestSiteDef "
Assembly="TestSiteDef, Version=1.0.0.0,
Culture=neutral, PublicKeyToken=a300f1f2da8ae976"
%>
Clean, build and deploy the solution. It works like charm. (Note: the warning message on visual web part may still exist, but you can ignore it).

Assuming your .ascx.vb file is inheriting from the web part class, you can add the custom properties in the same manor (language syntax aside).
Be sure to use the attributes to correctly identify and scope the properties. (see:
http://www.sbrickey.com/Tech/Blog/Post/SharePoint_Attributes_for_Web_Part_properties)
Scott Brickey
MCTS, MCPD, MCITP
www.sbrickey.com

Google search, youtube, facebook, and yahoo all giving 404 errors 9-9-13

Today I was having issues with my internet. After calling my provider (Time Warner Cable) and doing the proper troubleshooting it has boiled down to it is a problem with Firefox.
Whenever I load Firefox, I have it set so the same tabs open each time. Google, Facebook, Youtube, and Yahoo. Normally they would load and I would start my business or what-have-you, but today all are giving 404 errors. I have refresh the page it does not resolve the issue or if I manually type in the page address in, it too, does not load. Facebook will load properly once I type in the website in the bar and load it that way. If I open a new tab and try these websites (Google, Youtube, Yahoo, and Facebook) they all give me the 404 error, but if I click on the Facebook logo in the left hand corner of the page, it will load my news feed. CNN, TWC, and Gmail all load fine and I am able to use the services. Another thing I tried was disconnecting manually from my internet and then reconnecting. I changed my SSI and reset the modem several times still to no avail. If I load Google using my phone, it comes up fine, same as all the other sites listed. I restarted my computer twice (each after both resets of my modem) and I still have this problem. Now the "funny" thing now is that if I load these pages in Internet Explorer, they all load without any 404 errors. I have not tried clearing my cache or history today, and I checked the Firefox website to make sure I have the current version (I normally ALWAYS update my Firefox when it is requested). I don't want to have to uninstall Firefox I JUST got all my bookmarks back from the last uninstall I had to do (accidentally loaded an unwanted toolbar, yuck!) and also this was working fine yesterday and early this morning (2-3am central time)
ANY information regarding this issue will be welcome! Thanks!

The 404 or Not Found error message is a HTTP standard response code indicating that the client was able to communicate with the server, but the server could not find what was requested. How To Fix the 404 Not Found Error
Retry the web page by pressing F5, clicking the refresh/reload button, or trying the URL from the address bar again.
The 404 Not Found error might appear for several reasons even though no real issue exists, so sometimes a simple refresh will often load the page you were looking for.
Check for errors in the URL. Often times the 404 Not Found error appears because the URL was typed wrong or the link that was clicked on points to the wrong URL.
Move up one directory level at a time in the URL until you find something.
For example, if www.web.com/a/b/c.htm gave you the 404 Not Found error, move up to www.web.com/a/b/. If you get nothing here (or an error), move up to www.web.com/a/. This should lead you toward what you're looking for or at least confirm that it's no longer available.
Tip: If you have moved all the way up to the website's homepage, try to run a search for the information you're looking for. If the site doesn't have a search function, try navigating to the page you want using category links to dig deeper into the site.
Search for the page at a popular search engine. It's possible that you simply have the entirely wrong URL in which case a quick Google or Bing search should get you where you want to go.
If you do find the page you were after, update your bookmark or favorite to avoid the HTTP 404 error in the future.
Clear your browser's cache if you have any indication that the 404 Not Found message might just be yours. For example, if you can reach the URL from your phone but not from your tablet, clearing the cache on your tablet's browser might help.
You might also consider clearing your browser's cookies, or at least the one(s) involved with the website in question, if clearing the cache didn't work.
Change the DNS servers used by your computer but usually only if an entire website is giving you a 404 error, especially if the website is available to those on other networks (e.g. your mobile phone network or a friend in another city).
404's on an entire website isn't particularly common unless your ISP or government filters/censors websites. No matter the reason, if it does happen, giving another set of DNS servers a try is a good step to take. See my Public DNS Servers List for some alternatives.
Finally, if all else fails, contact the website directly. If they've removed the page you're after then the 404 error is completely legitimate and they should be able to tell you that. If they've moved the page, and are generating 404's instead of redirecting visitors to the new page, they might be very happy to hear from you.
A WHOIS search, using the site's domain name (e.g. weather.com) as your search term, should give you some contact information.
If the WHOIS search isn't helpful, know that many sites can be reached via email at [email protected], replacing website.com with the real website name. Contacting a site via one of their social networking profiles is another good idea.

Sharepoint-Hosted App giving FORBIDDEN error when i use REST Api

Hi,
I have created a sharepoint hosted app which will create Team site on button click.
I used REST Api and NAPA Tool to develop this app.
Napa tool gives to things ClientWebpart.aspx and Default.aspx.
When i run my Default.aspx code is working fine but ClientWebpart.aspx is giving FORBIDDEN error when i am trying to create site.
Below is the code which i used to create site
code:
var hostweburl;
var appweburl;
$(document).ready(function () {
hostweburl= decodeURIComponent(getQueryStringParameter("SPHostUrl"));
appweburl = decodeURIComponent(getQueryStringParameter("SPAppWebUrl"));
function createSPWeb() {
$.ajax(
url: appweburl +
"/_api/SP.AppContextSite(@target)/web/webinfos/add?@target='" +
hostweburl + "'",
type: "POST",
data: JSON.stringify(
'parameters':
'__metadata': { 'type': 'SP.WebInfoCreationInformation' },
'Url': 'RestSubWeb',
'Title': 'RestSubWeb',
'Description': 'REST created web',
'Language': 1033,
'WebTemplate': 'sts#0',
'UseUniquePermissions': false
headers: {
"accept": "application/json;odata=verbose",
"content-type": "application/json;odata=verbose",
"X-RequestDigest": $("#__REQUESTDIGEST").val()
success: successHandler,
error: errorHandler
NOTE:This is on sharepoint online.
Please help
Regards,
sudeep

So in the app you are testing, are you using the FQDN or the NetBIOS name? Bad practice but could you test with both (hard code the absolute URL for testing purposes) then retest your app?
If you are making a web part based on the new app model this will be an "app part" and probably have the same issues you are experiencing. If this is for something internal rather than a product you are developing to resell then the script editor /
content editor web part approach could work for you.
Paul
Paul Mather | Twitter |
http://pwmather.wordpress.com | CPS

Site definition/localhost trouble

On advice of another poster, I scrapped an old site definition that may have a troublesome bad link for a fresh one. It was not successful.
I am receiving a "not found" error, as the URL for my formmail page is appearing incomplete. It should be http://localhost/srbartending/srbregistermail.php
but it is coming up http://localhost/srbregistermail.php
If I hand type the correct URL, it's there. The testing server site definition page is set properly. It works on the remote server.
I am mystified -- can anyone help?
Thx, Ned

I've noticed that too.
But if I create a folder within the folder I want to go to, it will select the folder I wanted to go to.
Thats my work around. I think it could be some cache problem.

Site definition DW-MX ver 6.1

Site defintion will not let me input any information on
'create new/edit site' to FTP with.
It will not recognize FTP server info. But when I input exact
info. in an FTP agent like SW-FTP
connection is established everything works. I really think my
DW-MX has been corrupted or
something 'cause I should be able to use my site definition
(FTP) in DW. Maybe Zone Alarm
firewall problem. Please advise me how to get FTP to work and
upload files. thanks

did you read the technote i linked?
http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=tn_16485
Read that linked technote.
"Dreamweaver TechNote
Error when accessing sites: Server busy ... the other program
is busy ...
choose 'Switch To' to activate
Issue
When attempting to create a new site or edit an existing
site, Dreamweaver
fails with the following error:
Server Busy
This action cannot be completed because the other program is
busy. Choose
'Switch To' to activate the busy program and correct the
problem.
buttons: [Switch To...] [Retry] [Cancel] (grayed out)
Note: This TechNote only applies to Windows XP Pro and
Windows 2000 Pro
users who have Microsoft Internet Information Services (IIS)
installed"
the fix is given further down.
> Yes...I get a 550 error and/or server busy. On one site
it tells me your
> connected
> but nothing is screened and freezes screen.

Lost site definition in CS5.5

My IMac crashed and now l the Site Definitions file is lost, I have tried to do a restore from my Time Machine but I am unable to find the Site Definitions Folder
I have even tried reinstalling Dreamweaver as per the instructions in the Adobe support site after reinstalling DW I am still unable to make a new site, I am getting an error message that tells me that the Sprite Assets folder is not inside the site
Should I move the Dream Weaver application from the Applications Folder to the Trash and reinstall DW? or what?
Some help will be appreciated

Whenever DW starts acting up, the first thing I do is clear the program cache:
Deleting a corrupted cache file
If that doesn't take care of it, I move on to restoring preferences:
http://helpx.adobe.com/dreamweaver/kb/restore-preferences-dreamweaver-cs4-cs5.html
If restoring preferences doesn't clear the issue, the "nuke it from orbit" option would be a fresh re-install using the Cleaner Tool:
http://helpx.adobe.com/creative-suite/kb/cs5-cleaner-tool-installation-problems.html

Site definition giving http error: 0

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