When using a VARA object that has a bind parameter that is a variable, and setting that VARA as a reference within a Prompt (PRPT) - the bind variable is not resolved if it is set within the JOBS the PRPT is attached to.
This is as designed.
Release : 12.2
Component : AUTOMATION ENGINE
Due to order of activation:
Data that is within a PRPT object is referenced and resolved before any data that is set with the job is generated. This means that in order to have a VARA resolve within a PRPT, any bind parameters would need to be defined within the PRPT as well and not within the job object.