I have a .Net webservice which I deployed on a win 2003 server which is a domain controller. When I try to run any webmethod from the webservice, I get http 500 internal server error. When I set breakpoints in the webservice code in VS.Net 2003, it seems no code is executed at all before the internal server error occurs. Even when I use VS.Net on the server to create a simple webservice, the webmethod will not execute and I get internal server error. Can anyone help me with this problem? Is there anything to do with domain controller issues? Thanks!

Have had the same problem myself recently. It seems like some exceptions can't be caught within a web service. I have a service which interacts with a database then does some file manipulation, the exception handling works (as does stepping through in VS) if I do something like try to open a file that doesn't exist but neither works if I try to reference an invalid parameter in a SQL command. To make matters more difficult IE defaults to hiding the true cause of the error - if you disable the 'Show Friendly HTTP Error Messages' option in IE you will probably see the true cause.

The true cause is: File or assembly name dgnln1b2.dll, or one of its dependencies, was not found. But I could not find this dll in any machine, not even in the machine where this webservice works fine. Any advice?