Kepler

I'm trying to report on a record token. I make a simple workflow with {{data = 1, timestamps = 2}} pasted in a Constant, and add Constant's output to my report design, but on execution get this error:

(Location of error unknown)org.apache.fop.fo.ValidationException: Error(Unknown location): fo:table-body is missing child elements.
Required Content Model: marker* (table-row+|table-cell+)

and a popup error.

I found someone w/ a similar error that garnered this response:
http://marc.info/?l=fop-user&m=120819139826155&w=2