Value cannot be null. Parameter name: config

[ihill]

Getting this error when trying to use the Checkbox API in a .NET web application. I've followed the Web Service Developer documentation but can seem to correct this.

[pwiesner]

Can you provide more information. What is it you are trying to do and what is the error message you receive? If this is private information please contact the support team for further assistance.

[ihill]

Trying nothing fancy just simple code to see if we have everything setup correctly

Dim Test As Integer
Test = Checkbox.Users.Group.GetMembersCount(1004)

When the code is run I receive the error about the parameter "config" being null

The source of the error is Prezza.Framework.Common

[ncushing]

From the snippet of source code that you posted, it looks like you are calling the underlying API directly rather than using the web services. All of the calls to the web services are made through the proxy classes described in the Web Service Developer document.

There is nothing wrong with calling the underlying API directly. It just requires more work to ensure that the various components used by Checkbox can properly load their configuration information. If you wish to continue making direct calls to the API, please contact support. We have just created a document and sample application that describes the extra steps you need to this.

-Noah

[ihill]

Thanks.

More precisely, what we are attempting to do is to write a stand alone API that will be scheduled to run daily. It will search our class rosters based on X number of days until they start of the class or Y number of days after the class has completed and send all registered students an Invitation to take a survey using Checkbox 4.3 services. We would like to use the Checkbox Invitation Manager to send and track emails. We do not see this option available on any of the provided Web Services provided to us.

[ncushing]

First, let me apologize for the late reply. We had a problem with the forum for over a month that prevented thread notifications from being mailed to our support staff and we just found about it this week.


We do plan to release a web service in version 4.5, due in late December, that will add invitations functionality.

-N