try {
if (m.matches()) {
filename = m.group(3);
int x = Integer.parseInt(m.group(1));
int z = Integer.parseInt(m.group(2));
ChunkData data = Region.getChunkData(new File(filename),
ChunkPosition.get(x, z));
if (data == null) {
System.err.println("No such chunk in region: (" + x + "," + z + ")");
return new ErrorTag();
}