Hi there,
I upgraded firmware on DHI-NVR4208-8P and IVS functionality is lost.
Old firmware: V3.201.0000.1.R.20160409
New firmware: V3.203.0000.0.R.20170612
When I try to downgrade - I instantly get "Update failed!" followed by a reboot.
I suspect it is checking for build date or version and...