Using 2 flows to show data side by side

[CDeking1]

I am creating a report that needs to have the data go from the top of the page to the bottom than back up to the top of the page. I am having trouble getting this to work. I keep getting the following error: Basic Error: 6 Module: NewReportApp::appReportStub::grpLimit%Start Line: 5 Use of a Null instance handle. Do you want to debug. When I click Yes to debug it goes to the following line: sFlowFreeSpace = GetPageList().GetCurrentFlow.GetFreeSpace().Height
Does anybody have any ideas on why it is doing this or is there a different way that I should be going about doing this report. Thanks for the help in advance.
Christy