error/moodle/dmlwriteexception
De MoodleDocs
This indicates that a general error occurred when Moodle tried to write to the database. If you turn on Debugging you will get more detailed information about what the problem is.
When importing questions in Aiken format after successful reading all questions this error emerges when saving in the database. No definite rule why. Ver. 2.0
Tracker item: https://tracker.moodle.org/browse/MDL-31337 -
