Hi, Some users reported problems with my sea data, they get error messages since about a week like: Precomp sea data seems to be wrong, land-only tile is flooded around 57.304688,-3.164063, index key is 2654208_-163840 All coordinates are in Great Britain, and this error and build aborts also happens if the data they try to compile is far outside the UK and does not contain it. Since I don't get that with my one year old mkgmap version, I run into the first challange: building the current mkgmap version with SeaGenerator enabled... Is there any chance to update mkgmap and all dependencies to use a newer java version? I need openjdk-1.8 to build mkgmap and Oracle jre-1.8 to run it... mkgmap will not work with openjdk-1.8 and it looks like Oracle does not really provide a jdk-1.8 anymore... Now with mkgmap r4808 I get the same errors already when generating the precomp sea data. But I cannot find any problems with tje OSM data: no coastline checker reports any problems in the UK area... Any idea how to solve this correct? Thanks, Thorsten -- Thorsten Kukuk, Distinguished Engineer, Senior Architect SLES & MicroOS SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nuernberg, Germany Managing Director: Felix Imendoerffer (HRB 36809, AG Nürnberg)