Hello, I am seeing a collision between custom line TYPs when I generate two different .img files (different Map IDs (--mapname= parameter to mkgmap)). Here is what I am seeing and was wondering if anyone could offer ideas: Map 1 : TYP file : Type=0x100001 (solid red), contains a single line Map 2 : TYP file : Type=0x100001 (solid green), contains a single line Both .img files get loaded into my gps (montana) and are enabled and both lines show, however, map 2's lines shows as red, not green, as expected. If I disable map 1, map 2's line still shows *incorrectly*. If I delete map 1 form the gps, then map 2's line shows correctly. I thought that each map had its own TYPs and the GPS would sort out which TYP to display for each map's line. It seems that the gps unit is getting confused or caching the line TYPs from the "first loaded" map and using those for subsequent maps. If it were true that an earlier loaded map's custom TYPs override later loaded maps, how would it be possible to sort out custom types across different maps? Another thought I had is that since both my maps share the same family id and product id, could this be causing the collision? I cannot find any decent documentation on what family id and product ID are supposed to be. Thanks for your help, Scott