Population Selection - Context Definition

It looks like by default it is not in 'development' mode, and you can't make changes to the delivered Context Definition, or its Selection Mapping.
Change the configured value and all the fields on the configuration pages become editable.

SELECT *
FROM PS_SCCPS_INSTALL;

This should equal 'DEV'.

Instance Variables

This does not work:

If any(&instanceVariable) Then
...

This does work:

Local string&x = &instanceVariable;
If any(&x) Then
...

Haven't had time to look at why that is the case yet.