Got it!

Variable scoping determines when a variable is “visible” to a program. In Caché ObjectScript, there are two sets of rules for variable scoping:
 -  The standard (and newer) scoping mechanism, which is based on procedure blocks. This is the preferred mechanism for new applications and is the default used by the Caché Studio. Within a procedure block, all non-% variables are private variables.


 set %tstVar = "Green"