diff --git a/numass-main/src/main/java/inr/numass/workbench/NumassWorkbenchController.java b/numass-main/src/main/java/inr/numass/workbench/NumassWorkbenchController.java
index 3ebdb1c1..a2a53890 100644
--- a/numass-main/src/main/java/inr/numass/workbench/NumassWorkbenchController.java
+++ b/numass-main/src/main/java/inr/numass/workbench/NumassWorkbenchController.java
@@ -19,7 +19,7 @@ import hep.dataforge.exceptions.NameNotFoundException;
 import hep.dataforge.fx.ConsoleFragment;
 import hep.dataforge.fx.FXProcessManager;
 import hep.dataforge.fx.LogOutputPane;
-import hep.dataforge.fx.MetaEditor;
+import hep.dataforge.fx.configuration.MetaEditor;
 import hep.dataforge.fx.ProcessManagerFragment;
 import hep.dataforge.io.IOManager;
 import hep.dataforge.io.MetaFileReader;
diff --git a/numass-viewer/build.gradle b/numass-viewer/build.gradle
index 0e4ad5e8..2b78bb4a 100644
--- a/numass-viewer/build.gradle
+++ b/numass-viewer/build.gradle
@@ -5,7 +5,7 @@ if (!hasProperty('mainClass')) {
 }
 mainClassName = mainClass
 
-version = "0.3.3"
+version = "0.3.4"
 
 description = "The viewer for numass data"
 
diff --git a/numass-viewer/src/main/java/inr/numass/viewer/NumassLoaderViewComponent.java b/numass-viewer/src/main/java/inr/numass/viewer/NumassLoaderViewComponent.java
index 027059e4..64ae8cef 100644
--- a/numass-viewer/src/main/java/inr/numass/viewer/NumassLoaderViewComponent.java
+++ b/numass-viewer/src/main/java/inr/numass/viewer/NumassLoaderViewComponent.java
@@ -351,6 +351,7 @@ public class NumassLoaderViewComponent extends AnchorPane implements Initializab
             detectorPlotFrame = new JFreeChartFrame(frameMeta);
         } else {
             detectorPlotFrame = detectorPlot.getPlot();
+            detectorPlotFrame.clear();
             detectorPlot.removePlot();
         }
 
@@ -361,9 +362,9 @@ public class NumassLoaderViewComponent extends AnchorPane implements Initializab
                     .setValue("showLine", true)
                     .setValue("showSymbol", false)
                     .setValue("showErrors", false)
+                    .setValue("JFreeChart.cache", true)
                     .build();
 
-//            detectorPlotFrame.clear();
             callback.setMaxProgress(points.size());
             callback.setProgress(0);
             for (NMPoint point : points) {
@@ -375,6 +376,7 @@ public class NumassLoaderViewComponent extends AnchorPane implements Initializab
                 //TODO add update instead of replace action
             }
             detectorPlot.setPlot(detectorPlotFrame);
+            callback.setProgressToMax();
         });
 
     }