Synthetic Fails to Copy 2

Hi there,

We have the following file:

multi_synth.FLATFILE_ALL.SYNTH_WKLY

inside the folder:

d:\Program Files\Veritas\NetBackup\db\config

The synth file contains this:

TARGET_STU=TAPEPOOL
VOLUME_POOL=OFF_T_FLAT_WKLY
SOURCE_COPY_FALLBACK=PRIMARY
COPY=2
ENABLED=YES
FAIL_MODE=ALL

When I run a synthetic backup, it succeeds, but, only to disk storage unit. When Netbackup creates jobs to copy the data to the Tape STU, it fails with the following error: No Images Were Found to Synthesize.

Can anyone help shed some light on why the Synth backups would fail to tape, but, succeed to disk?

Much appreciated

Seth