diff -r 41adf1dfc7a7 -r 25f16349644b etherlab/CommonEtherCATFunction.py
--- a/etherlab/CommonEtherCATFunction.py	Sat Sep 29 16:39:25 2018 +0300
+++ b/etherlab/CommonEtherCATFunction.py	Sat Sep 29 16:40:56 2018 +0300
@@ -142,7 +142,7 @@
 # --------------------------------------------------
 #    Common Method For EtherCAT Management
 # --------------------------------------------------
-class _CommonSlave:
+class _CommonSlave(object):
 
     # ----- Data Structure for ethercat management ----
     SlaveState = ""