I wanna implement in my project option to draw route on the map using HERE maps api, I read documentation and saw few examples and if I implement it all global and push static route to calculate distance like that:

```
    const platform = configPlatform();
    const defaultLayers = configLayers();
    var markers = [];
    var map = new H.Map(
    document.getElementById('mapContainer'),
    defaultLayers.vector.normal.map,
    {
      zoom: 10,
    }
    );

    var mapEvents = new H.mapevents.MapEvents(map);
    var behavior = new H.mapevents.Behavior(mapEvents);
    var icon  = setCustomMarker();

    const lineString = new H.geo.LineString();
    var polyline;
    var routingService = platform.getRoutingService();
    var routingParameters = {
    'mode': 'fastest;car',
    'waypoint0': 'geo!50.1120423728813,8.68340740740811',
    'waypoint1': 'geo!52.5309916298853,13.3846220493377',
    'representation': 'display'
    };

    routingService.calculateRoute(routingParameters, success => {
    console.log(success);
    });

```

It works fine, but I wanna do everything in functions (instantiate platform must be global and it's ok). First of all I wanna by navigator configure center of map (current user position) and next by event listener give user possibility to add markers to map and it all works but if I wanna next push data to routing service and calculate route between markers and whole distance I get following error:

> 
> Uncaught (in promise) TypeError: c is not a function at eval(eval at (mapsjs-core.js:70), :64:238)
> 
> 
> 

Even if I just call method routingService.calculateRoute() inside eventlistener I get the same error.It looks like something in calculateRoute function must be instantiate in time map loading because it works ok when I calculateRoute next to loading map but if I use that function I listener It doesn't work. Somebody had any idea how to make it possible to run this method in listener (instantiate globally routing service doesn't help) ??