AFO - Unable to open the item

Hello,

I need some help with this issue a one week a go my backup it's "completed with some exceptions" and

give the log information :"Unable to open the item............pdf file skipped".

We don´t understand because we didin't change any configuration and AFO (Advanced Open File) it's properly licencend and

selected on the configuration of the backup policy.

Please can anyone help us ?

Specs:

Win2003 R2 Enterprise

Backupexec 10d (V10.1 Rev.5629)

Best Regards