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> I think, Barbara has answered my question. I had defined array as Ascend > but did not sort it. But then shouldn't %Lookup search for the element in > complete array? Or because of its binary search it does not do so? How would the compiler know whether the array is sorted, unless you tell it? When you code ASCEND on the D-spec, you're telling the compiler "hey, compiler! This array is sorted in ascending sequence!" And the compiler, trusting that you're telling it the truth, uses a binary search because it's much faster than a normal sequential search. Since the data isn't sorted, you should remove "ASCEND" from the D-spec. That way, the %lookup() BIF will work properly.
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