Hi Garrett,

The answer is not immediate.

The error not derive from which of the two just or it is mistaken.
With this Hypothesis:
"I must have an only result, independently from the fact that exists or an index does not exist".

With this, if I have two various ones, sure there is an error.

VFPT they had one apparently ambiguous choice ( for EXACT OFF this ambiguity is not introduced ).

On first case, without index, LOOKUP search values using = comparison rule.

On second case, with index, LOOKUP search values using seek comparison rule.

But, because LOOKUP() it works also without indices,
LOOKUP() like model is:

LOCATE FOR SearchedField=eSearchExpression IN lookupTable && metacommand
=ReturnField


and therefore my choice falls on the first case:  
remove the ambiguity using the = comparison rule.

I'm sure that you will contest this.

But, even if the choice of the VFPT was corrected, not is trace of this in the documentation.

Fabio