Warning when I send message to another extension

When I send messages to another extension the log return the WARNING bellow, what is this:

    -- Executing [4701005@messages:1] MessageSend("Message/ast_msg_queue", "sip:4701005,""<sip:1901003@xxxx.com>") in new stack
[2018-02-22 23:57:35] WARNING[14595][C-0000007c]: pbx.c:4482 __ast_pbx_run: Timeout, but no rule 't' or 'e' in context 'messages'

My dialplan for messages is:

exten => _XXXXXXX,1,MessageSend(sip:${EXTEN},"${CALLERID(name)}"${MESSAGE(from)})

This message it its making reference to the Asterisk special extensions

t: Response timeout extension
When the caller waits too long before entering a response to the Background() or WaitExten() applications, and there are no more priorities in the current extension, the call is sent to the t extension.

Or

e: Exception Catchall extension
This extension will substitute as a catchall for any of the ‘i’, ‘t’, or ‘T’ extensions, if any of them do not exist

It seems your message it is never delivered

t is an incomplete number timeout, not a timeout on the actual operation.

The message was delivered, but the delay was very high, for example 10 or 30 seconds to deliver.
How can I solve it?

How is not an actual operation? I just sent a message and the log show this WARNING, and all messages that I send show it.

I’ve not used the message send, feature, so I’m not sure if it re-enters the dialplan somehow, but t generally means that the dialplan was waiting for the user to enter digits tot meet the dialplan’s minimum number length requirements. I’m not sure how WaitExten triggers t handling - I suspect code is part of pbx.c, but it seems unlikely that message sending has any direct ability to do so.

I don’t know what would happen if the messages destination responded with a redirect to an incomplete number.

You need to enable protocol debugging on the SIP channel, to see if anything his happening there, and you need to set a high verbosity, to see what is being attempted in the dialplan.