Bulk upload users.

Hello All,
This is my first post. Thank the Gibbonedu community for the excellent system.
Is there a sequence or steps for bulk upload of users (teachers, students)?
I tried exporting a User-Data-full, User-Data-staff template in “System Admin->Import From File” and upload the same file. But, I get some errors. Can someone guide please.

Thank you

I could resolve this issue. There was a typo in the Role defined in upload file. As this was not matching with the system defined role, the error was thrown.
Thanks, SG

Great work, and thanks for letting us know the solution : D