diff --git a/pantilt_inv.py b/pantilt_inv.py
index 63b3af5..5abee88 100644
--- a/pantilt_inv.py
+++ b/pantilt_inv.py
@@ -1,4 +1,14 @@
-import rtde_control #pip install ur_rtde  (use python 3.9)
+import rtde_control #pip install ur_rtde  
+#pip install ur_rtde
+#use python 3.9 
+#use min PIP 19
+#check /Python/Python39/Lib/site-packages/ if install was done in correct Python version
+#Visual Studio >= 2019 must be installed with C++ Packages 
+#boost must be installed (https://www.boost.org/)
+#"Modul wurde nicht gefunden" Error indicates missing dependencies
+#use https://github.com/lucasg/Dependencies/releases to check missing dependencies (drop rtde.dll, from /Python/Python39/Lib/site-packages/)
+#trick: copy missing DLL from boost directory into python site-packages folder
+
 import rtde_receive
 import time
 import math