ReadyDR - Operation not permitted

Hi,

I just did the transition from "ReadyNAS Replicate" to "ReadyDR". I'm using two RN312 NAS'. One is the main NAS server  and the second is the BACKUP NAS.

The first problem I encountered was, that older snapshots from 2014 seemed to be a problem. I always received an error message like "Operation not permitted" when I tried to do the INITIAL very first and large, complete data transfer.  When I checked the result after the (failed) end of the backup, I saw  that these older snapshots were missing. OK, so I deleted these old snapshots from my main  NAS server and  tried everything again. Result -> No error message -> Happy user -> OK so far.

During the setup process I configured the ReadyDR job for a daily backup  (the same rhythm as my snapshops on the main server) with INSTANT BACKUP.    It says, that  -> "Instant Backups send the snapshot immediately "AFTER" it is taken".

Unfortunately, now I receive an error message every morning, that there was a problem with the backup at midnight  -> "Operation not permitted". When  I check the history I can see, that the ReadyDR backup seems to start at about 00:00:30 and fails (Operation not permitted). The ReadyNAS system seems to try to do the ReadyDR backup again at about 01:00:00 (I don't know why), and THIS backup seems to succeed. 

It almost seems, that the now snapshot is not ready, when the ReadyDR backup starts?!?!

What is wrong here?? For this night (and the coming ones), I changed the ReadyDR backup  schedule from INSTANT to PERIODIC and defined a time window from 03:00:00 - 04:00:00 in the morning. But this can't be the the right solution when there is an option called "INSTANT BACKUP".

Please help us.

With kind regards