Hello , I use mkgmap-4921 with patch from Ticker Berkin -Angelchecker-V6. With that i get in Scandinavia following error : Internal Error Failed to render MultiPolygonRelation 1754729 and 304507. Rel. 1754729 is  'Ladoga'-sea with 5 226 Elements. Rel.  304507 is Multipolygon=water, 171 Elements.
I assume the error ist not specific to the patch...and more common..
How to avoid this ?

regards Thomas