RDS-ERR-1031 error message is displayed when running a report

When attempting to run a report using the IBM® Cognos® Mashup Service, the error message RDS-ERR-1031 Report Data Service was unable to retrieve the metadata... is displayed.

This problem can occur if the user only has EXECUTE and TRAVERSE permissions for the report package.

You can resolve this issue by giving the user READ permission for the report package.