Hi I found

Property pxLinkedRefTo in D_AttachmentList[LinkRefFrom:.pzInsKey].pxResults(n) is not accessible from a data transform by reading it  instead of updating. An error is reported when save the DT

Source—Property @baseclass.pxLinkedRefTo is undefined.

while other properties in the pxResults(n) can be accessible normally, like

pxObjClass pxInsName pzInsKey  

Actually all these properties can be seen in clipboard, value of pxLinkedRefTo is something like

DATA-WORKATTACH-FILE (class name) (case ID)!(time stamp)

Wonder why it can not be access from a data transform. Could you kindly suggest? Thanks.