"The media provided to continue the backup already contains data" with Partial overwrite set

My setup

Backup Server OS: Windows 2000 SP3
Backup Exec: 8.60 Rev 3878
Backup Device: Dell 132T PV

The following error occurs on Full Backups only and has occured repeatly with new tapes:
"Media provided to continue the backup contains information from one or more sets created during this backup operation. The operation can not be continued"
It backs up to the first tape and then tries to backup again to the same tape.

My setup is as follows
1. General Options - Media Overwrite: Partial with "Overwrite recyclable media contained in the target media set before overwriting scratch media".
    "Prompt before overwriting imported media" is unticked.
2. Media Set Properties:
Overwrite Protection Period: 1 Hour.
Append Period: Infinite - Allow Append

Any ideas?

gcousinsAsked:
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mcp_jonCommented:
Have a look a this link " http://seer.support.veritas.com/docs/190686.htm "

Best Regards !
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mcp_jonCommented:
This shuld also be useful : " http://seer.support.veritas.com/docs/195821.htm "

Best Regards !
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gcousinsAuthor Commented:
Do you think I should set the Media Overwrite Options to

"Overwrite scratch media before overwriting recyclable media contained in the targeted media set"?

Everything else is the same. Needless to say I don't want the full backup to start overwriting my daily differentials.
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mcp_jonCommented:
Yes, set the Media Overwrite, like you said.

As for the Daily Differentials Backup, you should have separate Tapes for them ! Do you ?

Best Regards !
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gcousinsAuthor Commented:
I have separate tapes for the differentials but in the past I found that when the media overwrite option was set to "Overwrite scratch media before overwriting recyclable media contained in the targeted media set" used tapes other than the full media set. I'll give it a go and let you know Wednesday week (I'm off Monday and Tuesday).

Regards,

Gary
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mcp_jonCommented:
Go for it !

Best Regards !
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