Free memory of waveform graph

[Pechmann]

Hello,
I'm logging temperature data once a minute and display 4 plots with 1440 points (data of one day) in a waveform graph.
The data of the waveform graph is updated every 2 minutes. Over the time the application allocates continously more memory (maybe until the system crashes).
Could anyone tell me how I can free the memory used by the waveform graph or its history ?

Thanks for any help,
Ralf.

[aderogba]

How to Clear Charts & Graphs.vi in LabVIEW help "Search Examples" demonstrates ways to clear charts before, during and after execution. This may provide you with some clues that you can apply to your vi.