# subnet_not_exists (/docs/errors/subnet-not-exists)

The netuid does not name an existing subnet on this network.

Netuids are not stable across networks: a subnet that exists on finney may not exist on testnet. `btcli subnets list` shows the valid netuids for the network you are connected to (check `--network`).

## Remediation [#remediation]

Use an existing netuid; `btcli subnets list` shows valid ones

## Chain errors [#chain-errors]

The exact chain error names (from the extrinsic receipt) that classify to `subnet_not_exists`; the description says what triggered the failure and where to check. Each name has its own page:

| Chain error                                                             | Description                                                                                                                                                                                                                                                            |
| ----------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [`MechanismDoesNotExist`](/docs/errors/chain/MechanismDoesNotExist)     | The target subnet or its sub-mechanism does not exist: the netuid is unknown, the mechanism index is at or above `MechanismCountCurrent`, or a non-dynamic `mechid` was requested. Check the netuid with `btcli subnets list` and the mechanism count for that subnet. |
| [`RootNetworkDoesNotExist`](/docs/errors/chain/RootNetworkDoesNotExist) | Root registration or root stake claiming found no root network in chain state, which only happens on misconfigured or freshly bootstrapped chains. Verify netuid 0 exists in `NetworksAdded`.                                                                          |
| [`SubnetDoesNotExist`](/docs/errors/chain/SubnetDoesNotExist)           | The admin-utils call targets a netuid with no registered subnet. Verify the `netuid` argument against `NetworksAdded` (the set of existing subnets) before setting hyperparameters.                                                                                    |
| [`SubnetNotExists`](/docs/errors/chain/SubnetNotExists)                 | The netuid passed to the call does not correspond to a registered subnet. Verify the netuid argument against `NetworksAdded` or `btcli subnets list`; the subnet may also have been dissolved.                                                                         |

The same explanation is available in the terminal: `btcli explain subnet_not_exists` (or `btcli explain <ChainErrorName>` for one exact chain error).