Hi,
the keywords "Parameter has invalid structure size" yields very few results. I only found 1 archived CR notes from version8.5... and it was a defect on that occasion.
have used CR2011/2013 many times, including with subreports, and never hit this problem on new reports.. v. strange.
I'm recommending that you contact Support - actually, I've just spotted an OSS logged for this problem . Are you related to Brady @ CFS consulting?
regards,
H