I'm working with some CityGML models within 3DCityDB. For visualization purposes I now want to export some of my buildings to KML with the exporter tool. When I draw the bounding box over my area of interest I get some coordinates, but after exporting it says

number of processed geometries: 0

When I try to export only one building using its gml_id I get a kml file, but when I open it in Google Earth Pro I end up somewhere in the middle of the Arctic Ocean without seeing my building. I assume there's a problem with the SRID. Anyone else encountered this problem or has a solution for it?