The Meaning of AFUpdateOption.Replace

Discussion created by rarmstrong3@slb.com on Apr 29, 2014
Latest reply on Apr 29, 2014 by ekuwana

I am using the following command to write values to PI:


server.UpdateValues(pivalues, OSIsoft.AF.Data.AFUpdateOption.Replace)


I noticed that sometimes I get two values at the same timestamp but different values.


The 'substituted' flag is not set for either value.


I would have expected the second value to "replace" the first.


Am I misunderstanding how PI works?


BTW: compression is disabled for the PI points in question.