I've been using a series of scripts to control my office lights. F keys on my main Mac trigger the remote scripts to run on a MacMini (on my LAN) dedicated to running Indigo. I've been running these scripts for years without any issues, until upgrading the main Mac to Yosemite. The scripts often fail to dim the lights, run several minutes later or sometimes work instantly like before. When the lights fail to dim AEServer spikes the CPU on the Mac mini at 80 to 90%.
Here are the specs:
Mac mini: Indigo 6.0.14, OS 10.5.8
MacBook Pro, OS 10.10.1
In the example script I've changed the password and the IP address.
tell application "IndigoServer" of machine "eppc://MacMini:password@xxx.xxx.xx.x"
brighten "Office Lights" to 40
end tell