diff --git a/numass-main/src/main/java/inr/numass/actions/PrepareDataAction.java b/numass-main/src/main/java/inr/numass/actions/PrepareDataAction.java
index 6047d0e5..fbfa281c 100644
--- a/numass-main/src/main/java/inr/numass/actions/PrepareDataAction.java
+++ b/numass-main/src/main/java/inr/numass/actions/PrepareDataAction.java
@@ -160,7 +160,7 @@ public class PrepareDataAction extends OneToOneAction<NumassData, Table> {
         } else {
             head = dataFile.getName();
         }
-        head = head + "\n" + new XMLMetaWriter().writeString(meta, null) + "\n";
+        head = head + "\n" + new XMLMetaWriter().writeString(meta) + "\n";
 
         ListTable data = new ListTable(format, dataList);
 
diff --git a/numass-main/src/main/java/inr/numass/actions/ReadLegacyDataAction.java b/numass-main/src/main/java/inr/numass/actions/ReadLegacyDataAction.java
index bb83357d..e0476947 100644
--- a/numass-main/src/main/java/inr/numass/actions/ReadLegacyDataAction.java
+++ b/numass-main/src/main/java/inr/numass/actions/ReadLegacyDataAction.java
@@ -45,9 +45,9 @@ public class ReadLegacyDataAction extends OneToOneAction<Binary, NMFile> {
     protected NMFile execute(Context context, String name, Binary source, Laminate meta) throws ContentException {
 //        log.logString("File '%s' started", source.getName());
         RawNMFile raw = getNumassData(source, meta);
-        if (meta.getBoolean("paw", false)) {
-            raw.generatePAW(buildActionOutput(context, name + ".paw"));
-        }
+//        if (meta.getBoolean("paw", false)) {
+//            raw.generatePAW(buildActionOutput(context, name + ".paw"));
+//        }
 
         if (meta.getNodeNames(false).contains("debunch")) {
             DebunchAction debunch = new DebunchAction();
diff --git a/numass-storage/src/main/java/inr/numass/storage/NumassDataLoader.java b/numass-storage/src/main/java/inr/numass/storage/NumassDataLoader.java
index cb4045fd..5b618050 100644
--- a/numass-storage/src/main/java/inr/numass/storage/NumassDataLoader.java
+++ b/numass-storage/src/main/java/inr/numass/storage/NumassDataLoader.java
@@ -26,7 +26,6 @@ import hep.dataforge.storage.api.Storage;
 import hep.dataforge.storage.filestorage.FileEnvelope;
 import hep.dataforge.storage.loaders.AbstractLoader;
 import hep.dataforge.tables.Table;
-import hep.dataforge.values.Value;
 import org.apache.commons.vfs2.FileObject;
 import org.apache.commons.vfs2.VFS;
 import org.slf4j.LoggerFactory;
@@ -189,7 +188,7 @@ public class NumassDataLoader extends AbstractLoader implements ObjectLoader<Env
 
         double timeCoef = envelope.meta().getDouble("time_coeff", 50);
         try (ReadableByteChannel inChannel = envelope.getData().getChannel()) {
-            ByteBuffer buffer = ByteBuffer.allocate(7*1000); // one event is 7b
+            ByteBuffer buffer = ByteBuffer.allocate(7 * 1000); // one event is 7b
             buffer.order(ByteOrder.LITTLE_ENDIAN);
             while (inChannel.read(buffer) > 0) {
                 buffer.flip();
@@ -329,17 +328,20 @@ public class NumassDataLoader extends AbstractLoader implements ObjectLoader<Env
 
     @Override
     public Instant startTime() {
+        if (meta.hasValue("start_time")) {
+            return meta().getValue("start_time").timeValue();
+        } else return null;
         //Temporary substitution for meta tag
-        Envelope hvEnvelope = getHVEnvelope();
-        if (hvEnvelope != null) {
-            try {
-                return Value.of(new Scanner(hvEnvelope.getData().getStream()).next()).timeValue();
-            } catch (IOException ex) {
-                return null;
-            }
-        } else {
-            return null;
-        }
+//        Envelope hvEnvelope = getHVEnvelope();
+//        if (hvEnvelope != null) {
+//            try {
+//                return Value.of(new Scanner(hvEnvelope.getData().getStream()).next()).timeValue();
+//            } catch (IOException ex) {
+//                return null;
+//            }
+//        } else {
+//            return null;
+//        }
     }
 
     @Override
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 40ca13d6..734561d1 100644
--- a/numass-viewer/src/main/java/inr/numass/viewer/NumassLoaderViewComponent.java
+++ b/numass-viewer/src/main/java/inr/numass/viewer/NumassLoaderViewComponent.java
@@ -281,7 +281,7 @@ public class NumassLoaderViewComponent extends AnchorPane implements Initializab
 
     private void setupInfo(NumassData loader) {
         Meta info = loader.meta();
-        infoTextBox.setText(new JSONMetaWriter().writeString(info, null).
+        infoTextBox.setText(new JSONMetaWriter().writeString(info).
                 replace("\\r", "\r\t").replace("\\n", "\n\t"));
     }
 
diff --git a/numass-viewer/src/main/java/inr/numass/viewer/Viewer.java b/numass-viewer/src/main/java/inr/numass/viewer/Viewer.java
index e2941037..80b089c7 100644
--- a/numass-viewer/src/main/java/inr/numass/viewer/Viewer.java
+++ b/numass-viewer/src/main/java/inr/numass/viewer/Viewer.java
@@ -15,23 +15,27 @@
  */
 package inr.numass.viewer;
 
+import ch.qos.logback.classic.Level;
+import ch.qos.logback.classic.Logger;
 import hep.dataforge.exceptions.StorageException;
 import hep.dataforge.storage.commons.StorageManager;
-import java.io.IOException;
 import javafx.application.Application;
 import javafx.fxml.FXMLLoader;
 import javafx.scene.Parent;
 import javafx.scene.Scene;
 import javafx.stage.Stage;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
 
 /**
- *
  * @author Alexander Nozik
  */
 public class Viewer extends Application {
 
     @Override
     public void start(Stage primaryStage) throws StorageException, IOException {
+        ((Logger) LoggerFactory.getLogger(Logger.ROOT_LOGGER_NAME)).setLevel(Level.INFO);
         new StorageManager().startGlobal();
 
         FXMLLoader fxml = new FXMLLoader(getClass().getResource("/fxml/MainView.fxml"));