Declare Expressions are not triggered from a Data Transform
R-D-E rule is not getting fired in data transforms. There are set of data transforms which invokes sequentially and couple of properties are defined to calculate declaratively (R-D-E) and those properties needs to evaluated before calling other data transform.
As per below article it seems to be an enhancement request. Is it still valid for 7.3.1?
What is best way to trigger the expression in data transform (At least After each Apply-DataTransform method) .
work around :-
created a generic activity to call Data transform and passing data transform name dynamically to activity.
Call the activity from data transform .using utility function
Posted: 3 weeks ago
The article you found should still be valid for 7.3.1. You would need to use an activity in that case as the declare expressions will fire at the activity step boundaries.