Too many targets

When I type, I get this message:

Too many targets: NAMES

And other variations on the theme.

The reasons are varied, and depends on the command you entered, and the options you chose to enter with the command.

NAMES

The /names command can only have one target (one channel name)

• This is a valid command.

/names #test

• This is an invalid command, there are two targets (two channel names)

/names #test,#help