Error: LiveData Web Service is not available

Author: Sergey Sorokin

Published: 2010-07-22 04:41:00

Last update: 2013-09-21 20:53:30

Tags: m2m
application pool

Slug: Error-LiveData-Web-Service-is-not-available

The remote server returned an error: NotFound.

In some rare cases, after installing CSWorks and running Pipes and Tanks Demo, you can see the following error:

This means one simple thing: ASP.NET cannot run LiveData Web Service code. There can be different reasons for this. The first thing you should do in this case is to get as much additional error information as possible. Check application event log - it may give you some clues. Also, try to get LiveData Web Service definition from your browser at http://localhost/CSWorksDemo/LiveDataWebService/Service.asmx.

The browser will probably give you some more details about the error. Consider the following example.

The problem in this particular case is that ASP.NET cannot write temporary binary it compiles for a specific page or web service. There can be several root causes for that, for example: error in the ASP.NET installation, changing ASP.NET  worker process account without modifying temp folder privileges etc. There is a lot of information about this issue in the net, here are some good sources:

The idea is to give the account ASP.NET runs under, say NETWORK SERVICE, or LocalSystem, or "ASP.NET v4.0 Classic" account (depends on which account you are using, see your IIS Manager settings, Application Pools, "ASP.NET v4.0 Classic" pool properties) full access to all temporary folder it may use while compiling ASP.NET page or service. Those folders include:

c:\WINDOWS\Microsoft.NET\...\Temporary ASP.NET Files

One would assume that ASP.NET setup (or aspnet_regiis command executed manually) should do that, but it looks like there is no 100% guarantee. Fixing folder access manually seems to be the best option. Unfortunately, there is nothing CSWorks installer can do here - it's ASP.NET setup problem.

The remote server returned an error: NotFound. (again)

Another scenario, same symptoms: LiveData Web Service is not available. The remote server returned an error: NotFound.

Navigating to http://localhost/CSWorksDemo/LiveDataWebService/Service.asmx gives the following error on a 64-bit system:

It sounds like ASP.NET worker process did not expect 64-bit code in the "bin" folder, so it cannot execute web service code. Let's open server manager and check Classic 4.0 Application pool settings:

Set "Enable 32-Bit Applications" to "False" and it solves the problem.


Another kind of error is common: LiveData Web Service is not available. [HttpWebRequest_WebException_RemoteServer]

This is usually caused by CSWorksDemo virtual directory ASP.NET version mismatch: CSWorks binaries require version 4.0, but the virtual directory uses another version. If you are using XP or 2003, right-click CSWorksDemo in IIS management console, select "Properties" and select ASP.NET 4.0 in the "ASP.NET" tab. If you are using 2008 or Windows 7, make sure you have selected "ASP.NET v4.0 Classic" application pool in CSWorksDemo virtual directory basic settings.

Another possible reason for this problem is: ASP.NET 4.0 web service extension (Windows 2003) or ASP.NET 4.0 ISAPI extension (2008,Vista, W7) is disabled. Please follow the instructions at
Installing IIS and enable correspondent extension manually.