KHLOVER, Did you ever get this resolved?
I have almost the same problem when my map is saving to the SD (Sandisk 2 GB) it goes through the motions and a pop up "Assert Failed" "File\Projects\GIS\At5Common\CartStream.cpp. Line 509. At5 Assert(VerifyRd(Arg.second))." I Press OK. Then get "Create Custom Map - creates a map file your GPS unit can use.:MapCreate.exe - Application Error" and in the box, "The instruction at "0x00000000" referenced memory at 0x00000000. The memory could not be "read." Click on OK to terminate the program." I do and it does without making a usable map.
I then get the same thing you do where I am asked to name the map and the mapfile shows up on my GPS unit but no map data is available even though the memory card reports the estimated map size correctly.
I have yet to be able to use the &%$#$% Map Create 6.3 program I paid $100...Anybody have any pointers??
