# Errors

The NEO dAPI will provide these basic errors. It is up to the wallet provider to provide additional information if they choose:

<table><thead><tr><th width="284">Error Type</th><th>Meaning</th></tr></thead><tbody><tr><td><code>NO_PROVIDER</code></td><td>Thrown when there is no interface capable of interacting with NEO blockchain</td></tr><tr><td><code>CONNECTION_DENIED</code></td><td>Thrown when API provider refuses to execute a transaction (e.g. trying to execute a transaction on an unavialable network)</td></tr><tr><td><code>RPC_ERROR</code></td><td>Thrown when a command relying on RPC connection to a network node fails</td></tr><tr><td><code>MALFORMED_INPUT</code></td><td>Thrown when an input such as the address is not a valid NEO address</td></tr><tr><td><code>CANCELED</code></td><td>Thrown when a user cancels, or refuses the dapps request</td></tr><tr><td><code>INSUFFICIENT_FUNDS</code></td><td>Thrown when the action does not have a sufficient balance</td></tr><tr><td><code>CHAIN_NOT_MATCH</code></td><td>The currently opened chain does not match the type of the call chain, please switch the chain</td></tr><tr><td><code>SCRIPT_ERROR</code></td><td>Script creation error, please check whether the parameters are correct</td></tr><tr><td><code>FAIL</code></td><td>The request failed</td></tr></tbody></table>


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