diff -r bc07b9910cdb -r d635680e4c2c etherlab/EthercatMaster.py
--- a/etherlab/EthercatMaster.py	Fri Sep 28 19:12:26 2018 +0300
+++ b/etherlab/EthercatMaster.py	Fri Sep 28 19:16:12 2018 +0300
@@ -449,7 +449,7 @@
             dialog.Destroy()
 
         if execute:
-            error, returnVal = self.RemoteExec(SCAN_COMMAND, returnVal = None)
+            error, returnVal = self.RemoteExec(SCAN_COMMAND, returnVal=None)
             if error != 0:
                 dialog = wx.MessageDialog(app_frame, returnVal, "Error", wx.OK|wx.ICON_ERROR)
                 dialog.ShowModal()