>Using Word 2003. Can anyone explain why the following works when executed from the Command Window ...

>oWord = newobject('word.application')           && returns an object
>oDoc = oWord.Documents.Open('WorkingFile.doc')  && returns an object
>loRange = oWord.ActiveDocument.Range(0,0)       && returns an object
>loRange.Find.Execute('OldVal', , , , , , .T., , , 'NewVal', , , , 2) && returns .T.
>oWord.Visible = .T. && I can visually verify the replace occured
>

>... but fails when I run it from a PRG? The only difference is the code above is in a PRG class and all the variables are now properties of the class (e.g., THIS.oWord, THIS.oDocument). loRange is just a variable created in a method.

Try oDoc = oWord.Documents.Open(getf('doc'))
if that works, it's a pathing problem to the document. You may need the fully qualified path.