How to simulate Robot by using simmech ?

 I would like to simulate Robot to analyse his vibration behaiviour in different Position. That is why I started to learn simulink and simmech. However, i recieved always this error message."Joint block should not be connected to Joint block.  Check validity of block connections and/or insert any necessary additional blocks."
What does it mean?
and could u advice me documents or videos to learn how to use simmechs to create robotsimulation?

Answer 1

[cemsi888]

And now i receive this Massage from Simulink

 Joint block should not be connected to Joint block.  Check validity of block connections and/or insert any necessary additional blocks.

How can I solve this Problem ?