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Vista - Data Log Viewer does not return data for specific period when filter is applied

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Power Monitoring Expert 8.X
Power Monitoring Expert 9.0

Vista - Data Log Viewer 

In Data Log Viewer - query wizard, if a filter for timestamp uses the equal sign ( "=" ) combined with a specific time range, the query returns a single timestamp instead the whole data selected. 
For example:
"timestamp = last_week()" or
"timestamp = yesterday()"

Use the greater sign ">" instead of the equal sign. 
For example:
''filter timestamp > this_week()''
"timestamp > yesterday()"
The Data Log Viewer will return the correct time range as expected.
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