How to remove Graphs witout Data Sources?

[hgd26]

Anybody help me, to remove unused Graphs witout Data Sources? How to locate it?

Thank in advance

[gandalf]

There's no easy answer. Because Graphs usually hold more than one data source. So it it possible, that one is missing and others are present.
A time consuming answer would be:
Scroll through all graphs (select graph tab and then visit "Preview Mode"). Failing graphs _may_ fail due to missing data sources. Identify failing graphs and delete them.
Reinhard