Help needed, can not generate "Waterfall"

[pg99]

Hello,

I'm using REW5.2 on my Dell computer and have generated some sPL reading charts, but when I tried to click 'waterfall". Nothing is created, the bottom left "Generate" button is greyed out. If I click the "Apply defaults" button on the top right, there is a Java error message.

I tried to restart REW, reboot my laptop and reinstall REW. Nothing worked.

The screen shot like below.

Thank you for your help,

Peter

 

[pg99]

One more thing, I have installed Java 8 on the PC and running

 

[John Mulcahy]

A waterfall cannot be generated for an average as it does not have an impulse response.

 

[pg99]

Thank you for your quick reply, it's working now on single chart