Figure 3-1 Utility Meter GUI Main Window

NOTE: If the Utility Meter GUI does not appear and you see this error:

"Exception in thread "main" java.awt.HeadlessException:

No X11 DISPLAY variable was set, but this program performed an operation which requires it. ..."

you did not set the DISPLAY environment variable.

If you see this error appear:

# %%Data Acqusition Server not launched

Data Acqusition Server not launched, Please check the Server!

the das_SERVER process is not running. To fix this, stop and restart the Utility Meter processes with the following commands :

3.1 Starting the Utility Meter GUI 43

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HP Pay per use (PPU) manual Starting the Utility Meter GUI