# Ice::UnknownLocalException

## Overview

### local exception UnknownLocalException extends UnknownException

This exception is raised if an operation call on a server raises a local exception. Because local exceptions are not transmitted by the Ice protocol, the client receives all local exceptions raised by the server as UnknownLocalException. The only exception to this rule are all exceptions derived from RequestFailedException, which are transmitted by the Ice protocol even though they are declared `local`.