Thanks. i have extracted .pbf file from this site http://extract.bbbike.org/ , is there any possible way to get .map file for extracted .pbf file. @devemux86
You can use map-writer, see detailed guide.
For questions regarding the maps please use Mapsforge / VTM forum. 
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thanks a lot. getting Out of memory when generting route for large files.
currently i have the same problem, can you explain how you figured out and fixed your installation.
thank you