report datasource changes when adding subreport

[gal64]

Hi,

 

I'd like to create a report with some subreports. The goal is to achieve an excel file with some sheets, each sheet

should be filled by another subreport. But that's far away.

 

I created two reports with a jdbc-connection. Both worked fine. In order to solve the problem described before I created

another report and tried to add the two reports  as subreports to it. But always, when I try to add a subreport, the content

of the datasources combobox changes to "Empty datasource" and therefore I get a report without any pages.

I read in the forum that someone had a similar problem, but he didn't explain how he solved the problem.

Can anybody help me?

Thank you very much, Gerhard.