Talked with Alex and tracked down why the codes were not working on the new c1iscex finally. The .bashrc and .cshrc files in /home/controls/ on c1iscex has the following lines:
setenv EPICS_CA_ADDR_LIST 22.214.171.124
setenv EPICS_CA_AUTO_ADDR_LIST NO
This was interfering with channel access and preventing read and writes from working properly. We simply commented them out. After logging out and back in, the things like ezcaread and write started working, and we were able to get the models passing data back and forth.
Next up, testing RFM communications between megatron on c1iscex. To do this, I'd like to move Megatron down to 1Y3, and setup a firewall for it and c1iscex so I can test the frame builder and testpoints at the same time on both machines.