> ## Documentation Index
> Fetch the complete documentation index at: https://cosmos-docs-cosmjs-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Ledger Errors

> Errors from Ledger hardware wallet interactions via @cosmjs/ledger-amino.

The `@cosmjs/ledger-amino` package throws specific errors for device
interactions:

| Error                                                        | Cause                                   |
| ------------------------------------------------------------ | --------------------------------------- |
| `"Please open the Cosmos Ledger app on your Ledger device."` | Dashboard is open instead of Cosmos app |
| `"Please close ... and open the Cosmos Ledger app..."`       | Wrong app is open                       |
| `"Outdated version: Please update ... Ledger App..."`        | Ledger app needs a firmware update      |
| `"DANGER: The ... Ledger app is in test mode..."`            | Test mode enabled on mainnet            |