We are using DPM Version: 4.1.3465.0 with System Center 2012 Service Pack 1 to back up VMs in our Hyper V Cluster. We have a total of 37 VMs with a combination of 2008r2 servers and 2012 servers. One of our 2012 servers will not backup, and we consistently get the message "An unexpected error occurred while the job was running. (ID 104 Details: The parameter is incorrect (0x80070057))". I have seen this error message when I Googled it, but cannot get past it. I have deleted the Protection Group and data and tried to re-create, but get the same errors. I also thought the the server might be mis-reporting the data size, but I expanded that to cover the replication data. I have also tried to perform consistancy checks multiple times with no luck. I have not seen a difinitive answer from my Google searches, so was hopeful someone has seen this also, and have had success in resolving. Currently this server has no backup recovery points, so I am worried if it does crash. I think I have the rollups installed as well.

Hi Kelly,

does the issue still persists?