SUBSCRIPTRANGE is disabled throughout the program, except
within the scope of the SUBSCRIPTRANGE condition prefix.
Result
When SUBSCRIPTRANGE has been raised, the value of the invalid
subscript is undefined, and, hence, the reference is also undefined.
Cause and syntax
The SUBSCRIPTRANGE program-checkout condition is raised whenever
a subscript is evaluated and found to lie outside its specified
bounds. The order of raising SUBSCRIPTRANGE relative to evaluation
of other subscripts is undefined.