USE25

Subscript %SUBSCRIPT% out of range in function %FUNCTION%.
The function has detected that the subscript entered
is outside the allowable range of values. For instance, the ST_PointN() function
returns the nth point identified by the index parameter.
If a negative value, 0, or a number greater than the number of points
in the source linestring were entered, this error message would be
returned.
Correct the subscript value and resubmit the function.