# TaoUsdPriceUnavailable (/docs/errors/chain/TaoUsdPriceUnavailable)

Gamma cannot be minted because the TAO/USD price is unusable: there is no feed, or the last feed is more than 300 blocks old. Check `tao_usd_price` and retry once the oracle has fed.

Declared by the `SubtensorModule` pallet; it classifies to the semantic code [`disabled`](/docs/errors/disabled).

Declared at [`pallets/subtensor/src/macros/errors.rs#L471`](/code/pallets/subtensor/src/macros/errors.rs#L471).

## Remediation [#remediation]

The TAO/USD price is missing or over 300 blocks old; check `btcli query tao-usd-price` and retry once the oracle feeds

The same explanation is available in the terminal: `btcli explain TaoUsdPriceUnavailable`.