Dear Philip,

First. An attribute doesn't know what is "onChanged" property. To launch a method when an attribute is changed use "dependencies" property:

 attributes: {

            "KwlContactName": {

                "dataValueType": this.Terrasoft.DataValueType.TEXT,

                "type": this.Terrasoft.ViewModelColumnType.ENTITY_COLUMN,

                "columnPath": "KwlProject.Contact.Name",

                "caption": {bindTo: "Resources.Strings.KwlContactCaption"},

                "dependencies": [

                    {

                        "columns": [ "KwlProject" ], // columns that trigger a call

                        "methodName": "onSomePropertyChanged"

                    }

                ]

            }

        },

Second. You cannot write project["Contact.Name"] because project variable doesn't have anything but value and display value fields. You should use client EntitySchemaQuery to read new contact name and set it to KwlContactName in async way.

Third. It seems you have an issue with localizable string. Maybe it doesn't exist or you didn't specified a value for language of user's profile.