I am trying to do data entry validation against several columns in my igGrid.  I found a posting showing how to do custom validation and I implemented it successfully against one column in my grid.  However when I try to implement it against 2 columns, I am getting a javascript error "'undefined' is null or not an object" from the validation code in the posting, referencing "_editor.validator()". I started out validating just the LOBName field, which works fine, but when I added validation for "SubLOBName" I started getting the error. 

The example I followed only showed validation for one column so I'm probably doing something wrong when I add the additional column.

Here is the code for my grid:

----------------

@(Html.Infragistics().Loader()
                                            .ScriptPath(Url.Content("~/Infragistics/js/"))
                                            .CssPath(Url.Content("~/Infragistics/css/"))
                                            .Render()
                                        )
                                        @(Html.Infragistics().Grid(Model.lobTable.AsQueryable())
                                            .ID("LOBGrid")
                                            .UpdateUrl(Url.Action("UpdateLOBGrid"))
                                            .AutoCommit(true)
                                            .AutoGenerateColumns(false)
                                            .PrimaryKey("BusinessProcID")
                                            .Width("100%")
                                            .Columns(column =>
                                            {
                                                column.For(x => x.BusinessProcID).DataType("number").HeaderText("Business Process ID").Width("33%");
                                                column.For(x => x.LOBName).DataType("string").HeaderText("LOB Name").Width("33%");
                                                column.For(x => x.SubLOBName).DataType("string").HeaderText("Sub LOB Name").Width("33%");
                                            })

                                            .Features(feature =>
                                            {
                                                feature.Paging().PageSize(15);
                                                feature.Resizing();
                                                feature.Updating().EnableAddRow(true).EditMode(GridEditMode.Cell).EnableDeleteRow(false)
                                                    .ColumnSettings(settings =>
                                                    {
                                                        //settings.ColumnSetting().ColumnKey("BusinessProcID").EditorOptions(@"validatorOptions: {errorLabel: 'GridValidation', onChange: true}").Validation(true);
                                                        //settings.ColumnSetting().ColumnKey("BusinessProcID").ReadOnly(true);
                                                        settings.ColumnSetting().ColumnKey("LOBName").EditorOptions(@"validatorOptions: {errorLabel: 'GridValidation', onChange: true}").Validation(true);
                                                        settings.ColumnSetting().ColumnKey("SubLOBName").EditorOptions(@"validatorOptions: {errorLabel: 'GridValidation', onChange: true}").Validation(true);
                                                        
                                                    });
                                                feature.Filtering();
                                                feature.Hiding().ColumnSettings(settings =>
                                                {
                                                    settings.ColumnSetting().ColumnKey("BusinessProcID").AllowHiding(false);
                                                });
                                            })
                                            .DataBind()
                                            .Render()
                                        )

-----------------

Here is the validation BLOCKED SCRIPT

-----------------

// validation scripts
    $.ig.loader(function () {
        customValidator("LOBGrid", "LOBName", validate);
        //alert("LOB");
        customValidator("LOBGrid", "SubLOBName", validate);
        //alert("SUB");
    });
    function validate(e) {
        /*
        The e parameter has two fields:
        e.value - value of the field
        e.message - message to be shown when the value is invalid
        */
        // MAKE YOUR CUSTOM VALIDATION HERE
        //alert(validateSpecialCharacters(e.value));
        // call the javaScript validateSpecialCharacters function in the global.js file.
        var success = validateSpecialCharacters(e.value);
        if (success) {
            return true;
        }
        e.message = "The text entered, '" + e.value + "', contains invalid characters.";
        return success;
    }
    /*
    This is the custom validator function for igGridUpdating
    It takes parameters:
    gridId - the id of the grid
    fieldKey - key of the field to be verified
    validateFunction - function with signagure
    validateFunction(e) {
    e.value - value of the field
    e.message - message to be shown when the value is invalid
    }
    There is no need to configure the field in the updating columnSetting
    igGridUpdating is mandatory for this function to work
    */
    function customValidator(gridId, fieldKey, validateFunction) {
        if (!$("#" + gridId).data("igGrid"))
            throw new Error("igGrid is not defined on element with id: " + gridId);

        if (!$("#" + gridId).data("igGridUpdating"))
            throw new Error("igGridUpdating is not defined");

        var _attached = false;
        var columnSettings = $("#" + gridId).igGridUpdating("option", "columnSettings");
        columnSettings.push({
            columnKey: fieldKey,
            required: true,
            editorOptions: {
                validate: true
            }
        });
        // add field setting to the updating columnSettings
        $("#" + gridId).igGridUpdating("option", "columnSettings", columnSettings);

        $(document).delegate("#" + gridId, "iggridupdatingeditcellstarted", function (evt, ui) {
            if (!_attached) {
                _attachCustomValidator();
                _attached = true;
            }
        });

        function _attachCustomValidator() {
            var editor = $("#LOBGrid").igGridUpdating("editorForKey", fieldKey);
            (function (editor) {
                var _editor = editor;
                var _validator = _editor.validator();
                _validator._setOption("checkValue", function (evt, ui) {
                    var value = _editor.value();
                    var args = { value: value, message: "" };
                    var isValid = validateFunction(args);
                    if (!isValid) {
                        ui.message = args.message;
                        return false;
                    }
                    return true;
                });
            })(editor.data("igEditor"));
        }
    }

------------

Thanks in advance!