Move answer text to answer layer

Hi

I want to create textframe for answer text in question layer and then move the textframe to anno layer, but keep the anchor in question layer.

I have created the textframe, but when i move the textframe to anno layer i am getting the below error.

Here is the code

var myDoc = app.activeDocument;

app.findGrepPreferences = null;

app.findGrepPreferences.appliedCharacterStyle = myDoc.characterStyles.item("Anno"); 

var AnnoList = myDoc.findGrep();

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

{

TextFr = AnnoList.textFrames.add({anchoredObjectSettings:{anchoredPosition:AnchorPosition.INLINE_POSITION, anchorXoffset:"1mm"}});

TextFr.geometricBounds = ["0mm", "0mm","5mm", "30mm" ];

AnnoList.move(LocationOptions.AT_BEGINNING, TextFr.texts[0]);

TextFr.fit (FitOptions.FRAME_TO_CONTENT);

L = app.activeDocument.layers.item ('AnnoLayer');

TextFr.itemLayer = L;

}

Regards,

Sangeetha