Custom Visual - Selecting, Filtering and Highlighting

Thanks, 

1/ I've tried selectionManager as well - that doesn't work for cross filtering more than one data point. Note there is a difference between selection and cross-visual filtering. Interactive services works for selection (i.e. selecting multiple points within the custom visual) but doesn't work for cross-visual filtering within the same report.

2/ Agreed. The question is how can I cross-filter visuals, selecting multiple dataPoints (SelectionId)? Each time I try and implement this it causes PowerBI to throw an error in the other visuals in the report. 

3/ I am using selectionHandler and BindEvents within the interactive services. SelectionHandler is the method on InteractiveServices class; selectionFilter is my own class within which basic and advancced filters are constructed/applied; DataPoint.convert() is a method to extract the datum from the d3 SVGElement.

        public bindEvents(params: ISelectionToolsParams, selectionHandler: ISelectionHandler): void {

            this.params = params;
            this.selectionHandler = selectionHandler;

            this.bindClickEventToClearCatcher();

            this.params.visualDataPoints.on('click', (el: SVGElement): void => {
                this.selectionFilter.reset();
                this.selectionHandler.handleSelection(DataPoint.convert(el), (d3.event as MouseEvent).ctrlKey);
                this.selectionHandler.applySelectionFilter();

                (d3.event as MouseEvent).stopPropagation();
            });

            this.params.categories.on('click', (el: SVGElement): void => {
                if (!(d3.event as MouseEvent).ctrlKey) {
                    this.clearSelection();
                }
                this.selectionFilter.addCondition(this.visFilterColumnTargets.ageRange, 'Is', (el as any));
                this.selectionFilter.apply();

                this.params.visualDataPoints.data().forEach((d: SVGElement) => {
                    const dataPoint: IDataPoint = DataPoint.convert(d);

                    if (dataPoint.age === (el as any)) {
                        this.selectionHandler.handleSelection(dataPoint, true);
                    }
                });

                (d3.event as MouseEvent).stopPropagation();
            });
}

Part of the problem is that PowerBI cusom visual API has not yet matured, it may do so over the next 12-18 months, but for now we are looking at other solutions.