[utils] Raise IOError if process path is not found

beat/web/utils/path.py

@@ -44,7 +44,7 @@ def resolve_process_path():
   r = os.path.join(basedir, 'process')
 
   if not os.path.exists(r):
-      raise RuntimeError("Cannot find `process' at `%s' - please check " \
+      raise IOError("Cannot find `process' at `%s' - please check " \
           "your installation" % basedir)
 
   return r