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When you have a multiple @If to eliminate NULLS there may be a better way:
@If( LotusNotesName != "" ; LotusNotesName ;
@If( LegalName != ""; LegalName :
@( NickName != ""; NickName; "Old what's his name")))
@Subset(@Trim( LotusNotesName:LegalName :NickName);1)
This will return the first non null from you list.