- Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
- if (activeVisualisation != null) {
- return DistrictNetworkUtil.colorContributions(graph, activeVisualisation);
+ if (vf != null) {
+ Resource activeVisualisation = graph.getPossibleObject(vf, DN.Diagram_hasActiveVisualisation);
+ if (activeVisualisation != null) {
+ return DistrictNetworkUtil.colorContributions(graph, activeVisualisation);
+ }
+ } else {
+ LOGGER.debug("No visualisation folder available for model {}", model);