When there is any issue with the assignment or grade to be posted, the API provides a generic error message: {"statusInfoSet":[{"imsx_codeMajor":"failure","imsx_severity":"error"}]}

From my experience thus far, this could mean:

Data incompatibility:

• lineItem assignDate is not between gradingPeriod.beginDate and gradingPeriod.endDate

• gradingPeriod provided is not child of lineItem.class

• result.student is not enrolled in lineItem.class

• result.scoreDate (or date of request) is before lineItem.assignDate

• result.score is less than result.resultValueMin or greater than result.resultValueMax

Functional incompatibility:

• Result has already been posted for the student and lineItem within the UI. As this isn't an “external” line item, there is no way to confirm this with the API

The OneRoster specification for error payloads provides for an optional human-readable description of the error that occurred - could this be provided based on the reason for the failure? This lack of information has caused many hours of headache trying to identify the issue, and also confusion with teachers and admins who do not know why their data failed to sync.