I uploaded a csv file with this content:

shortname;fullname;idnumber;category_idnumber;visible;startdate;enddate;format;enrolment_1;enrolment_1_password;enrolment_1_startdate;enrolment_1_enrolperiod
Wi17_4711;"WiSe 2017/18: 4711 MyTestCourse";Wi17_4711;1.1.1;1;16.10.2017;16.10.2018;weeks;self;1234;16.10.2017;3632400

Upload setting: "Create new courses only, skip existing ones" 

Course default settings: Sections:4

The course is created with startdate and enddate set to 16.10.2017, but enddate should be 16.10.2018!

"Course administration" ->"Calculate the end date from the number of sections" is checked, but the course has no sections.

A short investigation in the database shows: enddate = startdate + 7200 as a result of course/format/weeks/lib.php(get_section_dates) called without sections.

The creation of the default sections during upload seems to be missing ...