System.Object type which is not supported by PBI service.

HI Team,

My Stean analytics Job is failing with below error while sending data to POWE BI dataset. Any idea?

Correlation ID:

dcf074f9-7181-4efc-8391-d7c459add930

Error:

Message:

First Occurred: 06/19/2015 12:59:28 | Resource Name: output | Message: The column 'productname' is System.Object type which is not supported by PBI service.

Message Time:

2015-06-19 12:59:30Z

Microsoft.Resources/EventNameV2:

controller

Microsoft.Resources/Operation:

Diagnostic

Microsoft.Resources/ResourceUri:

/subscriptions/b1f6e964-51a2-44d8-84e2-5674331f3a83/resourceGroups/StreamAnalytics-Default-Central-US/providers/Microsoft.StreamAnalytics/streamingjobs/sasorderstreamdemo

Type:

DiagnosticMessage