I cant change my trackables T.T

Hello All.

I'm trying to change "StoneAndChips" file  and i revised "ImageTargets.cpp" file .

but i cant T.T

Log message :Dataset file StonesAndChips.xml not found /DetectorNFT4_DataSet::beginModify(): Dataset is already in modify state/

                       Failed to load dataset 'StonesAndChips.xml'.  ///  Failed to load tracker data

===========================================

QCAR::DataSet* dataSetTest3            = 0;

--------------------------------

dataSetTest3 = imageTracker->createDataSet();if (dataSetTest3 == 0)    {        LOG("Failed to create a new tracking dataSetTest3.");        return 0;    }

----------------------------

 if (!dataSetTest3->load("test3.xml", QCAR::DataSet::STORAGE_APPRESOURCE))    {        LOG("Failed to load data dataSetTest2.");        return 0;    }

help please~