PI AF Web API Not Returning All Attributes After Update

Discussion created by mrosiak on Nov 12, 2019

I have a process that retrieves the list of attributes for an element, updates one of them, then retrieves the list of attributes again.  The second call to get the list of attributes does not return all of them, and in fact ends with the one that was updated.


For example, if there are ten attributes (as noted in PI System Explorer), and the fifth one is updated (via a PATCH call), the next time the list of attributes is queried, only five are returned.


Is this a bug, or am I missing something?