I just tried it on 1.7.3 and it doesn't work. All the parts are there but the "Turn on IKRC" option isn't available. If you have Steam or can roll back to 1.6.1 it works great. Hopefully the mod gets updated to the 1.7+ soon.
Update: Downloaded a clean copy of 1.7.3 and can confirm it works with no issues.
Inverse kinematics robotcontroller for Canadarm1, Canadarm2 and ANY
in KSP1 Mod Development
Posted
I add the same probleme I apply this procedure
but I C'ant turn on IKRC