Error: The function SUM can not work with values of type String

[aicirtap027]

Hi All,

I am trying to create a measure but i encountered error when trying to put this on the values of a visualization. I need to measure the metric "A2R GPI 4" then sum the client on it. Please help me to correct my syntax, thanks. 

GPI 4 = IF(SUM('Source Dump'[Metric]) = "A2R GPI 4", SUM('Source Dump'[Client]

ERROR:

[aicirtap027 · Accepted solution]

Already fix my problem.

I created this formula 

GPI 4 = SUMX(FILTER('Source Dump','Source Dump'[Metric]="A2R GPI 4"),'Source Dump'[Client])