DesertDweller

Yes, you're right... the last sentence was poorly phrased. In fact, I should've left that sentence out.

Thank you, I'll not update ISY's FW. Yes, I do have a few Z-Wave devices, but they run under a Samsung SmartThings hub. The ISY994i ZW PRO controls Insteon but no Z-Wave's.

On 4.7.3 with no intention of going to 5.anything. Don't have a climate module. Do have Z-Wave. Don't like all the install errors I'm seeing here about going to 4.8.0 and don't want to spin my wheels fixing a mess. I've got better things to do. My system is working just fine. Also don't consider this question as stupid. The question is: If there's no climate module do I need to attempt installing 4.8.0. Yes or No. Don't tell me I need V5... I don't. If the answer is yes, bfish says clearing the java cache allowed the update to work. In my Java cache, I see: ISY994 Administrative Console, ISY Launcher, Java Detection & NV_JavaDetect.32.0.1 Is it safe to delete these, including the ISY's? If so, I'll do that before the install. BTW: If the box connecting the Insteon network to the ISY is called a PLM (been awhile since that was installed), then I have a PLM. Does this affect the install in any way?