diff --git a/repose/__init__.py b/repose/__init__.py
index 0a0a43a..38cf6db 100644
--- a/repose/__init__.py
+++ b/repose/__init__.py
@@ -1 +1 @@
-__version__ = "1.9.0"
+__version__ = "1.9.1"
diff --git a/repose/command/_command.py b/repose/command/_command.py
index 75573e3..de575e7 100644
--- a/repose/command/_command.py
+++ b/repose/command/_command.py
@@ -48,7 +48,6 @@ def _init_repoq(self):
         return Repoq(self._load_template())
 
     def _report_target(self, target):
-
         if self.targets[target].out[-1][3] == 0:
             for line in self.targets[target].out[-1][1].splitlines():
                 logger.info(blue("{}".format(target)) + " - {}".format(line))
diff --git a/repose/command/list.py b/repose/command/list.py
index 512d441..3ed401a 100644
--- a/repose/command/list.py
+++ b/repose/command/list.py
@@ -9,7 +9,6 @@ class ListRepos(Command):
     command = True
 
     def run(self):
-
         self.targets.read_repos()
         self.targets.report_repos(self.display.list_update_repos)
         self.targets.close()
diff --git a/repose/command/uninstall.py b/repose/command/uninstall.py
index 86a23da..9aea04b 100644
--- a/repose/command/uninstall.py
+++ b/repose/command/uninstall.py
@@ -51,7 +51,6 @@ def _run(self, orepa, host):
             self._report_target(host)
 
     def run(self):
-
         self.targets.read_repos()
         self.targets.parse_repos()
         orepa = []
diff --git a/repose/connection.py b/repose/connection.py
index bfa17c6..b5155e6 100644
--- a/repose/connection.py
+++ b/repose/connection.py
@@ -345,7 +345,6 @@ def readlink(self, path):
         return link
 
     def is_active(self):
-
         return self.client._transport and self.client._transport.is_active()
 
     def close(self):
diff --git a/repose/display.py b/repose/display.py
index e84cd38..b76d0c4 100644
--- a/repose/display.py
+++ b/repose/display.py
@@ -15,7 +15,6 @@ def list_products(self, hostname, port, system):
         self.println()
 
     def list_update_repos(self, hostname, port, repos):
-
         self.println(
             "{} on {}:{}".format(green("Repositories"), blue(hostname), blue(str(port)))
         )
diff --git a/repose/main.py b/repose/main.py
index 2243440..67f738f 100644
--- a/repose/main.py
+++ b/repose/main.py
@@ -5,7 +5,6 @@
 
 
 def main():
-
     parser = get_parser()
     if len(sys.argv) < 1:
         parser.print_help()
diff --git a/repose/messages.py b/repose/messages.py
index a10c6e8..0cdd4b4 100644
--- a/repose/messages.py
+++ b/repose/messages.py
@@ -61,6 +61,8 @@ def __init__(self, product):
         self.product = product
 
     def __str__(self):
-        return "Unsupported product {} version {}".format(
-            self.product.name, self.product.version
+        message = (
+            f"Unknow product {self.product.name} version {self.product.version}.\n"
         )
+        message += "Please update products.yaml file with product definition"
+        return message