Hi, I think I found the required bits. Seams to be the flag at 0x43 in the TRE header. Patch is attached. Seams to work fine in simulation mode on the nuvi 360. Lets see how it works tomorrow morning on the road ... Please let me know if this also works for you guys. Thanks Berni. Index: src/uk/me/parabola/imgfmt/app/trergn/TREHeader.java =================================================================== --- src/uk/me/parabola/imgfmt/app/trergn/TREHeader.java (revision 314) +++ src/uk/me/parabola/imgfmt/app/trergn/TREHeader.java (working copy) @@ -167,8 +167,8 @@ writer.put(getPoiDisplayFlags()); writer.put3(displayPriority); - writer.putInt(0xd0401); - + writer.putInt(0x110301); // Was 0xd0401 before. 31.03.2009 Changed to 0x110301 to increase route recalculation speed + writer.putChar((char) 1); writer.put((byte) 0);