Find and Move

Hi,

My Script is:

app.findTextPreferences.appliedParagraphStyle = "Sidebar Text";

myFind = myDocument.findText(true);

for(i=0; i<myFind.length; i++)

{

    myLib = app.libraries.everyItem();

myAnchorFrames = myLib.assets.item("Box").placeAsset(myFind[i].insertionPoints[-1])[0] ;

//    myAnchorFrame = myLib.assets.item("Box").placeAsset(myFind[i].insertionPoints[0])[0];

  myFind[i].move(LocationOptions.after, myAnchorFrames.textFrames[0].insertionPoints[0]);   

Error: Undefined is not an Object.

can any one Help