Index: /nodes/gformat.py
===================================================================
--- /nodes/gformat.py	(revision 8568)
+++ /nodes/gformat.py	(revision 8575)
@@ -14,5 +14,11 @@
 import sys
 import time
-import yaml
+try:
+  import yaml
+except ImportError, e:
+  print e
+  print "[ERROR] Please install the python-yaml or devel/py-yaml package"
+  exit(1)
+  
 
 NODE_DIR = os.path.dirname(os.path.realpath(__file__))