We ran into trouble with our existing compound PDFs when we attempted to upgrade from 7.6.11 to 7.7.03. The reports would fail with the following error: (FOC3296) Error found in Coordinated Compound Report: At Component report6 (FOC3303) Compound report COMPONENT out of order Compound Report is TERMINATING.....
It looks as if a new component attribute was added in 7.7 that is required for graphs. We were able to get the report to render by adding