<command> :Too many arguments
Response to too many arguments being provided for a command.
<command> :Bad function
Response to a command that supports functions, with invalid function sent by the user. For example, the EVENT command supports functions.
<command> :Bad level
Response to an ACCESS command with a bad level specified (i.e. not GRANT, DENY...)
<command> :Bad message tag.
Response to a DATA/REQUEST/REPLY with an incorrect message tag.
<channel> :Bad property specified
Response to a channel property command with a bad property specified.
<channel> :Bad value specified
Response to an attempt to set an integer property to a string value (PROP command).
:No permissions to perform command
For security reasons, the command/function/operation is not permitted for this level of client.
<package> :Already authenticated
The client is already authenticated with the server.
<package> :Authentication failed
The authentication failed due to a bad userid/password or server/network failure.
<package> :Authentication suspended for this IP
Authentication has been temporary disabled due to too many authentication failures from this IP.
<package> :Unsupported authentication package
The authentication package specified is not known to the server. ISIRCX command will return a list of supported authentication packages.
<command> :No access
Response to a user trying to change the ACCESS list for an object the user does not have sufficient privileges to alter.
:Duplicate access entry
An access entry already exists for the specified user mask.
:Unknown access entry
Response to ACCESS DELETE command when server does not recognize the entry to be removed.
:Too many access entries
Response to ACCESS ADD command when maximum number of access entries has been reached.
<event> <mask> :Duplicate event entry
The user has asked for an event that is already being sent.
<event> <mask> :Unknown event entry
Response to event remove command when user is not already receiving the event specified.
<event> :No such event type
Response to event add command when server does not recognize the event specified.
<event> :Too many events specified
Response to event add command when user may not add another event to monitor.
<object> :Does not permit whispers
Response to whisper command when channel does not permit whispers.
<channel> :Channel already exists.
The channel name in the CREATE command already exists on the server and the +c mode was specified.
<channel> :Already in the channel.
Response to join command when user is already in the channel.