Hikvision iVMS-4200 error: hcnetsdk.dll [91]

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