I don't think so. Rekordbox EXPORT mode should always work correctly, even without plan.
Of course you have to sync your collection (so the metadata like waveform and other) with your media (USB stick) you are using on your CDJ 3000s.
Maybe you chose a waveform option in Rekordbox which is not supported by the CDJ 3000?
Without further information this is just guessing :)
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