Installing and upgrading help

Emma - cron does, indeed, look "funny."  My Task History for WIndows shows that the job ran to completion five minutes ago, but I got in the habit of piping the log to a file that just over-writes every time it runs, just as a check.

THAT file has not been updated since January. (Before my upgrade.) Accordingly, I ran cron manually in a cron window, and NOW there is "stuff" to see.

The relevant log entry is here:

... started 16:43:55. Current memory use 38.5MB.

Outdated or missing info about available updates, forced fetching ... sending no

tifications ... Error: lib/moodlelib.php email_to_user(): Could not instantiate

mail function.

++ Error calling message processor email ++

* line 127 of \lib\classes\message\manager.php: call to debugging()

* line 88 of \lib\classes\message\manager.php: call to core\message\manager::sen

d_message_to_processors()

* line 229 of \lib\messagelib.php: call to core\message\manager::send_message()

* line 812 of \lib\classes\update\checker.php: call to message_send()

* line 625 of \lib\classes\update\checker.php: call to core\update\checker->cron

_notify()

* line 213 of \lib\classes\update\checker.php: call to core\update\checker->cron

_execute()

* line 49 of \lib\classes\task\check_for_updates_task.php: call to core\update\c

hecker->cron()

* line 75 of \lib\cronlib.php: call to core\task\check_for_updates_task->execute

()

* line 61 of \admin\cli\cron.php: call to cron_run()

Error: lib/moodlelib.php email_to_user(): Could not instantiate mail function.

++ Error calling message processor email ++

* line 127 of \lib\classes\message\manager.php: call to debugging()

* line 88 of \lib\classes\message\manager.php: call to core\message\manager::sen

d_message_to_processors()

* line 229 of \lib\messagelib.php: call to core\message\manager::send_message()

* line 812 of \lib\classes\update\checker.php: call to message_send()

* line 625 of \lib\classes\update\checker.php: call to core\update\checker->cron

_notify()

* line 213 of \lib\classes\update\checker.php: call to core\update\checker->cron

_execute()

* line 49 of \lib\classes\task\check_for_updates_task.php: call to core\update\c

hecker->cron()

* line 75 of \lib\cronlib.php: call to core\task\check_for_updates_task->execute

()

* line 61 of \admin\cli\cron.php: call to cron_run()

done

... used 11 dbqueries

... used 2.2522249221802 seconds

Scheduled task complete: Check for updates (core\task\check_for_updates_task)

To add to Emma's response, IIRC, there was a difference to how emails are sent between 2.5.x and 2.7.x, so indeed jumping from 2.5.x to 3.0.x would likely mean the settings to the new way of sending emails are likely empty.

Usman -

My "Environment" report says: version 5.4.4 is required and you are running 5.5.8.  I have not upgraded PHP recently.

I have manually run CRON from the command line, and it is still not sending out emails. Nor am I getting any error messages in the CRON log.