openstreetmap - OSM - Mapnik - areas rendered as background color -

i generating maps using mapnik , osm data (postgres , shapefiles). problem quite few areas, of believe considered "landcover", rendering background color. areas render background color regardless of zoom level.

for example, in between streets, blue. there forests render expected, of residential areas blue.

i using mapnik 3 stylesheet. running on ubuntu 16.04.

the images below show generating, , see (based on over openstreetmaps).

any suggestions should solve problem appreciated.

thanks.

what i'm getting

osm

the problem caused invalid zoom levels and/or minscaledenominator, maxscaledenominator values. have not narrowed down completely, removing attributes, i'm seeing land again.

thank help.