Hi, did you try this?

Load the admin OpenSSH key by typing:
ssh-agent bash
ssh-add ~admin/.ssh/admin_key
You are prompted to type a passphrase

Locate the backups to be securely deleted by typing the following on a single command line:

securedelete getb --id=USER@AUTH --password=PASSWORD --account=DOMAIN/CLIENT

Where USER is the Avamar user name, AUTH is the authentication system used by that user (the default internal authentication domain is “avamar”), PASSWORD is the password for the --id=USER@AUTH account and DOMAIN/CLIENT is the full location of the client machine.

Locate the backup you want to delete in the list and note the date in the created field.

Securely delete the backup by typing the following on a single command line:

securedelete delb --id=USER@AUTH --password=PASSWORD --account=DOMAIN/CLIENT --date=DATE

If successful, the securedelete delb command returns the following response:
1 Request succeeded

Regards.

Luis Rogerio

Hi. Thanks for feedback.

Created yesterday a SR... Let's see how it goes.

Thanks

Hi again.

Avamar support team says it's a bug... We'll have to re-initialize the avamar grid. Not a problem, as it's not in production yet...

Anyway, tried your solution. The first command returns only "request succeeded", witch actually makes sense because i've deleted all the backups already.

About the socond one, I don't have a date for the last parameter... That way, cannot proceed.

Thanks for helping.