To move from 3.7.8 to 4.1.15 , i did a fresh install of 4.1.15 because upgrades were failing.
1) I Backed up a course in 3.7.8 with users and user data. The course restored.
Enrolled users and user data have not restored to the Restored course.
The new site has no users other than site admin. Must i restore users before course+users restore? How may i successfully restore the courses with data?
2) Also, users restore did not restore time data such as first access.
The upgrade failed because you cannot jump from 3.7 to 4.1. You need to check the release notes which state that you have to be at 3.9 to upgrade to 4.1. Not sure why the users would not be restoring - is it possible you don't have the same authentication method in the new site - are you sure you selected restore user data? No errors?
Sounds like you need to turn on debugging - all the way to developer - and leave it on until reasons for course restore failures are discovered and fixed.
One reason course restores can fail is a missing setting for PHP.
Please see:
https://moodledev.io/general/releases/4.0
Server Requirements .... in particular: 'max_input_vars' setting.
And since you plan to upgrade, please see:
http://www.syndrega.ch/blog/#php-and-dbms-compatibility-of-major-moodle-releases
https://docs.moodle.org/405/en/Upgrading
and something to check before each hop in the march of upgrading ... Site Admin -> Server -> Environment Check.
Update the component then set the drop down pick list for Moodle version to each version higher than what it shows you are running to see what issues you will need to address before going t that version.
'SoS', Ken
