Hikvision iVMS-4200 error:
reconnecting error code hcnetsdk.dll [91] The operation is not supported by the channel
You sometimes get this error in the “Main View” in your NVR.
Here is how to fix it:
In iVMS click on “Control Panel” and “System configuration”
Click on Image and Uncheck the “Auto-change Stream Type” option
Click “Save”
Go back to “Main View” and choose a new view to reload all the cameras