Its not clear what you require, if you wish to lookup from 2 places can
the item exist in both arrays? If it can only exist in one array

if(isna(firstloookup),secondlookup,firstlookup)

Assuming that the value must exist in one of the 2 arrays

but you need to provide more information as to what you are trying to
achieve. Are you returning numbers or text?

regards

Dav


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