Export of multiple tiles w/ texture baking crashing

[Zwixx]

I tried the following steps with the current retail version of WoW (offline mode, online mode the same)

1. Go to the tab Maps,
2. enter the search text "Nighthold"
3. Select all tiles
4. Click "Export Maptile"

the program works for a time (5 Minutes) then it crashed. Without a error Message. In the target folder only the map file (the map tile) is created. Other tiles works, other not.