Have iVMS-4200 V2.0.0.5 build 20190220 on iMac.
When 'Adding to Client' the first device - a new DS-2CD2385G1 (F/W V5.5.83 build190221) - we get:
'Error Code libHCNetSDK.dylib[11].(Data error. The data sent to or received from the device is incorrect.)'
Joy. This is repeated every 60...