diff --git a/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp b/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp
index 7069fbe6..3fa1f91f 100644
--- a/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp
+++ b/src/musredit_qt5/mupp/plotter/PMuppCanvas.cpp
@@ -634,12 +634,12 @@ void PMuppCanvas::ExportData()
     std::ofstream fout(fi.fFilename, std::ios_base::out);
     // write header
     for (int i=0; i<fPlotData.size(); i++) {
-      fout << fPlotData[i].xLabel.Strip(TString::kLeading).Data().Data() << ", ";
+      fout << fPlotData[i].xLabel.Strip(TString::kLeading).Data() << ", ";
       for (int j=0; j<fPlotData[i].yLabel.size(); j++) {
         if ((i == fPlotData.size()-1) && (j == fPlotData[i].yLabel.size()-1))
-          fout << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data().Data() << ", " << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data().Data() << "ErrPos, " << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data().Data() << "ErrNeg";
+          fout << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data() << ", " << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data() << "ErrPos, " << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data() << "ErrNeg";
         else
-          fout << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data().Data() << ", " << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data().Data() << "ErrPos, " << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data().Data() << "ErrNeg, ";
+          fout << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data() << ", " << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data() << "ErrPos, " << fPlotData[i].yLabel[j].Strip(TString::kLeading).Data() << "ErrNeg, ";
       }
     }
     fout << std::endl;