I'am having problem with a graph property node by using format & precision

I would like to display an amount of data in a waveform graph and to choose the X scale to display absolute time (whitout date information) or scaled decimal value.
Absolute time is a must because the scaling should reflect the acquisition time and not only a value in hour, minute and second.
Using the property node I can choose between 10 differents formats (0-Decimal, 1-Scientific, 2-Engineering, 3-Binary, 4-Octal, 5-Hexadecimal, 6-Relative Time, 7-Time and Date, 8-SI, and 9-Custom).
Format 7 - Time and Date should be a good choice but LabVIEW set automatically system time AND system date without any possibilities to change anything.
Trying format 9 - Custom ends everytime with error 1077 (invalid property value).
Any help to explain me how to use the format Custom or to give me a solution to switch between time (no date) and decimal scaling is appreciate.
Thank

In addition to the Xscale.Format property node, you also need to set the XScale.FormatString (see a little below the Format entry).
Use %<%.0X>T as format string.
Chilly Charly (aka CC)
E-List Master - Kudos glutton - Press the yellow button on the left...

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I'am having problem with a graph property node by using format & precision

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