AnsweredAssumed Answered

Values not returned derivied from a table lookup

Question asked by CarolPL on Apr 4, 2018
Latest reply on Apr 4, 2018 by sraposo

I have an issue where I’m using the PI AF database trying to return the value of an attribute whose result is derived from a table lookup

If the start and End dates are identical, for this query the AF SDK call returns



{"'4/04/2018 5:53:23 AM - 4/04/2018 5:53:23 AM' is not
a valid AFTimeRange"}


    HResult: -2146233067

    HelpLink: null

    InnerException: null

    Message: "'4/04/2018 5:53:23 AM -
4/04/2018 5:53:23 AM' is not a valid AFTimeRange"

    Source: "OSIsoft.AF.Asset.DataReference.TableLookup"

    StackTrace: "   at
timeRange, Int32 numberOfValues, String filterExpression, Boolean
includeFilteredValues, AFAttributeList inputAttributes, AFValues[] inputValues)
3372\r\n   at
attribute, AFDataReference dataReference, AFDataProvider inputProvider, UOM
desiredUOM)\r\n   at
query, AFAttribute attribute, AFDataReference dataReference, AFDataProvider
inputProvider, UOM desiredUOM, IErrorPackager errorPackager)"

    TargetSite: {OSIsoft.AF.Asset.AFValues
InterpolatedValuesByCount(OSIsoft.AF.Time.AFTimeRange, Int32, System.String,
Boolean, OSIsoft.AF.Asset.AFAttributeList, OSIsoft.AF.Asset.AFValues[])}



If I change the start and end date to be 1s apart, then no
problem and the value is returned. The lookup is totally time independent

This does not occur for similar AF calls to attributes that
are formula related.


Table properties for the lookup I have tried Stepped
(checked or not checked) – no effect. ConvertToLocal for timezone is checked


AFSDK version, runtime version v4.0.30319


Please let me know if you have an idea for this issue.

Thank you