working console application fails as a web service

[Brock]

Hi everyone,

I've written a application in VB .NET that uses some COM libraries from a
third party app. The console app calls a class that contains all the logic
for the com libraries and it runs ok.

I would like to expose the app as a web service, so I've written a web
service that calls the same class as the console app, however when I invoke
it, it fails with a number of mysterious errors from within the COM dll's.

Has anyone had any experience with this sort of problem before? Are there
known issues with COM and .net web services?

I have written the whole thing using MS Visual Studio .NET 2003 and imported
the COM libraries through the Projects->References menu. option. I can run
web services that do not call the COM libraries ok.

I have tried writing the app in c#, however the com interop calls fail even
earlier

It is enourmously frustrating and looks just about impossible to debug.

 

[Rodrigo García]

Hi.

I'm not very sure, but your problem could be in the Apartment Model used
when using web services.

Anyway, maybe the guys in the General->Distributed_Apps could give you more
help.