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function doOperation() {

    var selText = authorAccess.getEditorAccess().getSelectedText();

    var documentController = authorAccess.getDocumentController();

    var workspaceAccess = authorAccess.getWorkspaceAccess();

    try {



        if (selText.length() > 0) {

            //First get the selection bounds.

            var selEnd = authorAccess.getEditorAccess().getSelectionEnd();

            var selStart = authorAccess.getEditorAccess().getSelectionStart();



            //Get all the starting anchors in our document.

            var anchors = new Array(documentController.findNodesByXPath("//*:anchor[@next]", true, true, true));



//THIS SHOWS "1" EVEN THOUGH THERE ARE LOTS OF SUCH ANCHORS IN THE DOCUMENT.

            workspaceAccess.showErrorMessage(anchors.length);

            

            //Get the ids we care about.

            var relevantAnchors = [];

            for (var i = 0; i < anchors.length; i++) {

            

//THIS SHOWS THE ERROR MESSAGE BELOW.

                var nodeStart = anchors[i].getStartOffset();

                if ((nodeStart >= selStart) && (nodeStart < selEnd)) {

                    relevantAnchors.push(anchors[i].getAttribute('next').toString().substring(1));

                }

            }

        }



    } catch (e1) {

        //e1.printStackTrace();

        workspaceAccess.showErrorMessage(e1);

    }

}