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Need help with PI Powershell function Get-PIExpressionSummary

Question asked by K@8983 on Dec 4, 2015
Latest reply on Dec 11, 2015 by pthivierge

Need help with PI Powershell function Get-PIExpressionSummary:


I have a requirement to get record count for multiple tags for multiple time period.


I am getting results for Get-PIExpressionSummary but unable to get only Tag, Timestamp, value formats.


I am trying to assign result to different  variable but it's not working.

$Result = Get-PIExpressionSummary -Connection $pidataarchive -Times $times -SummaryType Count -Basis EventWeighted -Expression "'sinusoid'" -Intervals 1 | Format-List


$Tm = $Results.Value.Values[0] for StartTime

$Cnt = $Results.Value.Values[2] for Count


But it gives me error.


Cannot index into a null array


CategoryInfo : Invalid Operation: (:) [], RuntimeException

FulllyQualifiedErrorID : NullArray


Any help would be appreciated.