Hi I noticed a while ago that "test-map:all-elements" stopped working correctly. The map it generated showed a box around the map area, but within the map area, the device said 'no-map' and didn't show anything, however POI searches did work. I tracked it down to a couple of lines added to mkgmap/build/MapBuilder.java : processInfo() if (!(src instanceof OverviewMapDataSource)) poiDisplayFlags |= TREHeader.POI_FLAG_DETAIL; poiDisplayFlags is byte 0x3f in TRE So: Old maps and old all-elements, with poiDisplayFlags = 0 worked. New maps, with poiDisplayFlags = POI_FLAG_DETAIL, work, but all -elements doesn't. One of differences between a typical map and all-elements is that all -elements doesn't output a standard background (polygon 0x4b covering the complete map area); changing it to do so, then all features get displayed. However, transparent maps don't have a standard background and they work. Trying option --transparent with the original version of all -elements makes it work. I don't know if this behaviour was known or expected, but I thought it worth-while to note it down in this post. I didn't want all-elements to have a standard background so I've added --transparent to the comment about how to invoke it, also a few other option suggestions. The other change I made was to show elements against a green background as well as no background, as I was having trouble spotting many line -types that my new device shows as white. I've attached a patch for this. Regards Ticker