For Europe you will need arount 8-10GB of memory (rule of thumb - a bit more than the amount of map data compiled as .img). 4GB is clearly insufficient.

On 16 July 2015 at 20:28, Carlos Dávila <cdavilam@orangecorreo.es> wrote:

El 16/07/15 a las 12:45, Maciej Moczulski escribió:

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space

You must increase available memory with -Xmx parameter

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