When an OSM-Mapper makes a mistake, I sometimes correct this Error (or difference in opinion) by using mkgmap. highway=* & osmid()=22689239 { set highway=track; set tracktype=grade1; delete service } Which is OK, accepted by mkgmap syntax. Yesterday I made a mistake as well: INNER in Multipolygon is untagged and JOSM doesn't warn (no warning: "Untagged ways (1)"). Today I tried to correct my mistake: osmid()=941762308 { set landuse=forest } But, mkgmap doesn’t accept my correction: SEVERE (global): Error in style: Error: (inc/DEBUG_begin:148): Invalid rule, expression cannot be indexed: osmid()=941762308 I was assuming osmid() is a Primary Key. How to search for a Primary Key using mkgmap, If the way is also untagged? BTW, JOSM can find (search): id=941762308. Eric (AnkEric)