If you create an outline box with no title, that then contains the analysis, you can delete the contents of the analysis, and replace it with a new object by appending to the "No Title" outline box
notitle=outline box("",
biv=bivariate(x(.....),y(......)
);
biv(report)[<< delete;
biv=bivariate........
notitle<<append(biv(report));
This is a rough conceptual idea of what you could do
Jim