diff --git a/lmwsip.py b/lmwsip.py
index 15ffb2f..a259aa7 100644
--- a/lmwsip.py
+++ b/lmwsip.py
@@ -418,13 +418,13 @@ class LmwLoginFailure(Exception):
         self.message = message
 
     def __str__(self):
-        return("Login with user %s failed: %s", self.user, self.message)
+        return("Login with user %s failed: %s" % (self.user, self.message))
 
 class LmwCmdWarn(Warning):
     """Exception fro LmwSip on a cmd"""
     def __init__(self, cmd, message):
-        self.cmd     = cmd
+        self.cmd     = cmd.replace('\r', '')
         self.message = message
 
     def __str__(self):
-        return("Cmd %s failed: %s", self.cmd, self.message)
+        return("Cmd %s failed: %s" %(self.cmd, self.message))