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Thank you very much for your quick response and very helpful Dan, what I did was reverse back to older versions V3.... and slowly upgraded every version until I get to latest version V4.30.85. It seems to be ok except for question number 2 . As I set PTZ linking to preset camera number 2 for...

Hi Dan, Would you please advise on problems I have with NVR DS-7604NI-K1 (B) Firmware version V4.30.85, use with 4 camera DS-2DE2A404IW-DE3 Firmware version V5.6.800_210628. 1. When I set smart event line crossing detection or intrusion detection with linkage methods PTZ linking (preset), I...