Refresh Viz Charts

Hi,
I've a split App and I want to refresh the a viz chart in the detail view by selecting a different item of the master view.
My viz chart is built by calling the function showCharts of the detailController.
I've tried to refresh the model of the vizFrame but it doesn't work. Here is the code of the function in the master controller:
handleListSelect : function(evt){
var vizFrame = _grab('idVizFrameColumn');
if(vizFrame) {
vizFrame.getModel().refresh(true);
It seems that the function showCharts of the detailController should be called again, right?
How can I handle it?
Thanks in advance.
Best,
Matt

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