[mkgmap-dev] Possible Indexing Problem

Hi all last week i was playing around building new maps with mkgmap 4282 and the default style. Building smaller maps, i.e Nordrhein Westfalen, i don't see any problems but the last map i tried out was complete germany. And now it seems, that my device (GPSMAP 276Cx) will stuck while searching POIs or Adresses. Today i changed the image to be load onto the device and created it from MapSource instead the one build by mkgmap. The functionality is better, but even not 100%. My question for now is, is there a possibility to extract the index data out of the img File to check it on the PC and eventually modify the data ?