Reconnecting error code: open sdk string error 521009



Reconnecting error code: open sdk string error 521009


This is a Hikvision IVMS 4200 Older Version Error. If you want to solve this you need to replace OpenNetStream.dll file from C:\Program Files\iVMS-4200 Station\iVMS-4200\iVMS-4200 directory. Download the OpenNetStream.dll File From Below Link.


Download Link: OpenNetStream.dll


We have had to do this for every client using Hik-Connect for remote viewing/ playback in the past 6 weeks or so. Its a simple fix.

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