Filter Query to update the object

[Maharajan_Mahar]

I'm getting the following exception when I try to add the constraint. And, I'm pretty much following this link https://sdk.onbase.com/unitySDK/html/4f99b05d-562e-4972-8a0e-d54c38e13bb0.htm and below is my code. 

 public void Update()        {            Hyland.Unity.WorkView.WorkView wvModule = _application.WorkView;            var studentApplication = wvModule.Applications?.Find("Application Name");            Filter allStudentsFilter = studentApplication.Filters.Find("Student Search");            FilterQuery studentFilterQuery = allStudentsFilter.CreateFilterQuery();            studentFilterQuery.AddConstraint("OnBase Student ID", Operator.Equal, 2); // breaking here            FilterQueryResultItemList studentList = studentFilterQuery.Execute(10);            // code follows to update..       }

System.NullReferenceException
HResult=0x80004003
Message=Object reference not set to an instance of an object.
Source=Hyland.Unity
StackTrace:
at Hyland.Unity.WorkView.FilterConstraint.SetValue(Object value)
at Hyland.Unity.WorkView.ModifiableFilterQuery.AddConstraint(String dottedAddress, Operator op, String value)
at Hyland.Unity.WorkView.ModifiableFilterQuery.AddConstraint(String dottedAddress, Operator op, Int64 value)

[Brian_Kalbfus · Accepted solution]

I would try:

```

studentFilterQuery.AddConstraint("OnBaseStudentID", Operator.Equal, 2); // breaking here?

```

I don't believe attributes can have spaces in them.  When you create them, Onbase quietly ignores spaces you enter in the attribute name when you enter them for the Display Name.

[Maharajan_Mahar]

@Brian Kalbfus Thank you. It worked.