app.activeDocument.dtCrossReferences causes error

i downloaded utility says scan index , create page of cross references i've created in document. however, crashes error on line 2 (line 1 comment line):

 

var mycrossreferences = app.activedocument.dtcrossreferences;

 

error number 55

the error object not support property or method 'dtcrossreferences'

 

this second line of javascript utility.

 

anyone know changed cross-references item to?

how using script ? throught estk ? if latter, atrgetting teh right application ?

in cases, document open in target application ?

 

loic

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