Illegal characters in path when instantiating TCPClient()

[kmboogert]

Im trying to execute a cgi.exe file from IIS. I can execute this from the command line and it works great. When the file is loaded by IIS 6.0 and gets executed by accessing the url, I get a "Configuration system failed to initialize" exception message and the innerexception message is Illegal characters in path when the TCPClient() constructor gets called. Following is the stack trace:

at System.Configuration.ConfigurationManager.EnsureCo nfigurationSystem()
at System.Configuration.ConfigurationManager.PrepareC onfigSystem()
at System.Configuration.ConfigurationManager.GetSecti on(String sectionName)
at System.Configuration.PrivilegedConfigurationManage r.GetSection(String sectionName)
at System.Diagnostics.DiagnosticsConfiguration.GetCon figSection()
at System.Diagnostics.DiagnosticsConfiguration.Initia lize()
at System.Diagnostics.DiagnosticsConfiguration.get_So urces()
at System.Diagnostics.TraceSource.Initialize()
at System.Net.Logging.InitializeLogging()
at System.Net.Logging.get_On()
at System.Net.Sockets.TcpClient..ctor(AddressFamily family)
at System.Net.Sockets.TcpClient..ctor()

Thanks in advance for any help.

[Plater]

Despite the error message, my guess? Permissions issue.
Does the ASP_NET user (or does IIS6 use a different user?) have the correct priveledges to open directories/sockets?

[kmboogert]

@Plater
Plater,
Thanks for your response. I have to agree with you. I went down the permissions path and spent a lot of time on it without being successful. This was quite a small CGI app so I ported it to a c++ win32 app. That resolved resolved the socket open issue. Must be something to do with .NET. I'd really like to understand what the problem is for two reasons:. The remainder of the project is written in .Net and don't really want to sway away from our established practices as well as it really ticks me off that I never really figured it out. So if anyone can actually lead to a resolution I would be happy to post it for others.

[Plater]

Did you have it output to some debug location the URLs/Paths and etc it was trying to form? Maybe something would be spotted there?