I'm trying to upgrade from v.5.0.16 to v.5.0.16(c) because my insteon heartbeats are not working.
I have a isy994 zw and am using the udi_oadr_5.0.16C.zip ...I get to 96% complete and then receive a ”Upgrade Failed: Failed uploading file (reported written size is invalid)”
I've rebooted the isy, I've cycled power on the isy, I've re-downloaded the firmware image...I've tried updating 5x times...I'm stuck.
What does this message indicate, and how do I fix the issue?