Internet Direct (Indy) Version 9.0.2 Beta
EIdTelnetServerOnDataAvailableIsNil
Exception for Telnet OnDataAvailable event notification.

EIdTelnetServerOnDataAvailableIsNil = class(EIdTelnetError)
Description
EIdTelnetServerOnDataAvailableIsNil is an EIdTelnetError exception descendant raised when TIdTelnet.DoOnDataAvailable is executed and no event handler has been assigned for the notification.