I have two properties which uses Prompt List for the values that can be selected.
I am using one property as "Return" Values in the Decision table and another property as one of the Columns in the left hand Side. The Return value property does show the options in Drop down when trying to change. But the other Property does not. When Trying to enter any different value which is not in the Prompt list it shows the error. But why Drop down is not available on the left hand side of the Decision table.
I tried another thing as well. I tried to use the same Property in right and left hand sides of the Decision table. The Right hand side shows the values in drop down but not the other one.
The issue is not totally clear but is there a reason why you didn't add the values to the property? Do the rules need to be delegated to business users? So why is it needed to use a decision table? I'm assuming you configured the decision table to Evaluate All Rows?