diff --git a/overviewer_core/aux_files/genPOI.py b/overviewer_core/aux_files/genPOI.py
index 3c1978c..36405a1 100755
--- a/overviewer_core/aux_files/genPOI.py
+++ b/overviewer_core/aux_files/genPOI.py
@@ -58,15 +58,17 @@ def handlePlayers(rset, render, worldpath):
     # only handle this region set once
     if 'Players' in rset._pois:
         return
+    dimension = None
     try:
         dimension = {None: 0,
                      'DIM-1': -1,
                      'DIM1': 1}[rset.get_type()]
     except KeyError, e:
-        mystdim = re.match(r"^DIM_MYST(\d+)$", str(e))  # Dirty hack. Woo!
+        mystdim = re.match(r"^DIM_MYST(\d+)$", e.message)  # Dirty hack. Woo!
         if mystdim:
             dimension = int(mystdim.group(1))
-
+        else:
+            raise
     playerdir = os.path.join(worldpath, "players")
     if os.path.isdir(playerdir):
         playerfiles = os.listdir(playerdir)