I'm trying to get a DOTA 2 map into TF2. I've used BSPSource to decompile the BSP and I now have a vmf file. However when I try to open it in Hammer (opened from the TF2 folder) I get reading chunks 5% and then it all closes down. I've looked through the vmf in notepad to see if there were any issues with the double quotation marks, but as I expected, it being a valve map, there aren't any issues there. Anyone got any ideas?