ETO Server 2014 error: NullReferenceException

[matthias.rolf]

Hello there!

I have a ETO Server 2014 running on a Win 2008 Server R2 64-bit system. On that server, I have a simple test ETO application configured. That application consists only of a child block, nothing more.

Now, I created an ETO Silverlight application using the VIsual Studio 2012 wizard and configured it to connect to above ETO server. The connection seems to work, as far as I can tell (i.e. the IntentClientFactory's CreateClientProxy finishes without an error. But: When the loading process of the model viewer has completed I immediately receive the message "An error has occured". I don't get any exception on the client side of things.

Checking the error log on the server reveals that it ran into a NullReferenceException in the call to Autodesk.ETO.UI.Net.Server.Intent.ServerIntentUIProject.GetProjectData().

This error happens with every ETO application I configured on the server so far when I run the ETO Silverlight application created by the wizard. When running the UI Tools Tutorial on this setup, I receive another error stating that Remote_CreateBlock received a string where it expected an MList, but I think that's another issue entirely.

Can anyone tell me what I could do to solve that NullPointerException problem?

Thanks for reading and your time.

[scott_anderson-adsk · Accepted solution]

This is usually caused by not including the UIPartMixin design. At a minimum, your root part must include this design. Any other parts you want to show up in the treeview also need to.