Eset Server Mirror Error: COULDNT_COPY_FILE

Everything had been humming along fine until a few days ago apparently. I got an email notification from the server telling me it couldn't update.
I checked on it and in the Server Options under Update state it displays

I've tried checking Clear Update Cache and clicking Update now, but it just returns to the same state.
This is a new server install that is going to have over 300 client machines on it eventually. It currently has 154 clients... so I have 154 machines not getting updates.
I haven't be able to find any info about this error just be searching so far.
Help!

 

Well, I got it working again.
I restarted the "ESET Remote Administrator Server" service.
Any ideas on why this happened?
I'm glad I had the email notifications setup.

 

i'm same problem... any ideia?

 

Did you restart the service?