WCF Nightmare

Question

Hi,
I am new to WCF and am having some major difficulties.
I am using a hosting application developed by another developer in my organisation.
The problem I am having is when I try to send my populated object across the wire I get "Object reference not set to an instance of an object".
A little about my class structure:
I have a class design for patient data.
It is made up of many Collection properties e.g. IList patientAddresses, IList patientIdentifiers.  If I populate one of the ILists it works fine, but when I attempt to populate more than one I get the above error.
Please Help...
my head is sore from the repeated battering on the wall...

Mark Adamson · Answer

Thanks Andrew,
Upon my initial investigation I was under the same impression. Although, it does seem a bit odd that all Ilists being passed will work independently, just not when being passed with another populated list.

Andrew Fenster · Answer

That's not a WCF error.  That's a standard exception, not a WCF fault.  So that makes it sound like you're blowing up somewhere in your own code.  That is, the error is being generated somewhere in your own local code, not by the remote web service you're trying to call.  There's really not a good way for one of us to diagnose the problem further without staring at your code.