see http://seer.support.veritas.com/docs/192180.htm

John Francis wrote:

> This is only happening on a particular day for example [Thursday] where it
> says in the log file.This is running on Windows NT 4.0 SP5 and Exchange Server
> 5.5. Veritas Backupexec 7.3 version. It has Autoloader connected to it.
>
> No appendable Media could be mounted.
> Error - Mount Failed
>
> ^^^^^
>
> Physical Volume Library Media not found.

I just went thru this and it sounds like you are running into the same issue
I did. I found info on Veritas' web site that stated what appendable media
is..."Blank or empty media is NOT considered appendable media." Check into
this, it might take care of your problem.
PC

"John Francis" wrote in message
news:3afbe634$1@hronntp01....
>
> This is only happening on a particular day for example [Thursday] where it
> says in the log file.This is running on Windows NT 4.0 SP5 and Exchange
Server
> 5.5. Veritas Backupexec 7.3 version. It has Autoloader connected to it.
>
> No appendable Media could be mounted.
> Error - Mount Failed
>
> ^^^^^
>
> Physical Volume Library Media not found.