hi!
I also encountered the same error last night.
So far, 20140415 Xvision version was installed, which has flaws.
I tried to upgrade the "01530123_mini_8ch_nor_A_old_20140417.update" file, but after the update and reboot only "Network Video Recorder" screen and turns off the video output.
The 20140415 firmware three update file is, and this is just one file! This should not be a problem?