Symptoms

From Usage Reports (Operations > Services > Usage Reports) a customer is trying to upload a usage file to their panel, but it is getting rejected for the following error: 

RequestError: Unable to load /aps/2/resources/5b630a03-a278-4cc8-b593-fb4e57227d94/usageReports status: 500 Unsupported Usage Schema value: {QT}. 

Cause

The customer is using VRDM, which is an old implementation it does not support QT schema.

Resolution

Usage Collector (UC) is the replacement for this implementation and as it is indicated in the documentation shared in the description it does support it but in order to update it from Vendor-rated Data Manager (VRDM) to UC a migration process has to be executed according to the documentation: Migrating from a Vendor-rated Data Manager Based Solution to a Rating Engine Based Solution.