diff --git a/plugins/org.jkiss.dbeaver.data.transfer/src/org/jkiss/dbeaver/tools/sql/task/SQLScriptDataReceiver.java b/plugins/org.jkiss.dbeaver.data.transfer/src/org/jkiss/dbeaver/tools/sql/task/SQLScriptDataReceiver.java
index 8ab0e1d389de..6e326addc2b0 100644
--- a/plugins/org.jkiss.dbeaver.data.transfer/src/org/jkiss/dbeaver/tools/sql/task/SQLScriptDataReceiver.java
+++ b/plugins/org.jkiss.dbeaver.data.transfer/src/org/jkiss/dbeaver/tools/sql/task/SQLScriptDataReceiver.java
@@ -16,17 +16,14 @@
  */
 package org.jkiss.dbeaver.tools.sql.task;
 
+import org.jkiss.dbeaver.model.data.DBDDataReceiver;
+import org.jkiss.dbeaver.model.exec.*;
+import org.jkiss.utils.CommonUtils;
+
 import java.io.IOException;
 import java.io.Writer;
 import java.util.List;
 
-import org.jkiss.dbeaver.model.data.DBDDataReceiver;
-import org.jkiss.dbeaver.model.exec.DBCAttributeMetaData;
-import org.jkiss.dbeaver.model.exec.DBCException;
-import org.jkiss.dbeaver.model.exec.DBCResultSet;
-import org.jkiss.dbeaver.model.exec.DBCResultSetMetaData;
-import org.jkiss.dbeaver.model.exec.DBCSession;
-
 /**
  * SQLScriptDataReceiver
  */
@@ -40,17 +37,19 @@ public void fetchStart(DBCSession session, DBCResultSet resultSet, long offset,
         if (resultSet == null) {
             return;
         }
-        DBCResultSetMetaData rsMeta = resultSet.getMeta();
-        List<DBCAttributeMetaData> attributes = rsMeta.getAttributes();
-        rowSize = attributes.size();
-        try {
-            dumpWriter.append("Columns:\t");
+        if (dumpWriter != null) {
+            DBCResultSetMetaData rsMeta = resultSet.getMeta();
+            List<DBCAttributeMetaData> attributes = rsMeta.getAttributes();
+            rowSize = attributes.size();
+            try {
+                dumpWriter.append("Columns:\t");
 
-            for (DBCAttributeMetaData attribute : attributes) {
-                dumpWriter.append(attribute.getLabel() + "\t");
+                for (DBCAttributeMetaData attribute : attributes) {
+                    dumpWriter.append(attribute.getLabel() + "\t");
+                }
+            } catch (IOException e1) {
+                throw new DBCException("IOException writing to dumpWriter", e1);
             }
-        } catch (IOException e1) {
-            throw new DBCException("IOException writing to dumpWriter", e1);
         }
     }
 
@@ -59,26 +58,30 @@ public void fetchRow(DBCSession session, DBCResultSet resultSet) throws DBCExcep
         if (resultSet == null) {
             return;
         }
-        try {
-            for (int i = 0; i < rowSize; i++) {
-                if (resultSet.getAttributeValue(i) != null) {
-                    dumpWriter.append("" + resultSet.getAttributeValue(i).toString() + "\t");
-                } else {
-                    dumpWriter.append("NULL\t");
+        if (dumpWriter != null) {
+            try {
+                for (int i = 0; i < rowSize; i++) {
+                    if (resultSet.getAttributeValue(i) != null) {
+                        dumpWriter.append(CommonUtils.toString(resultSet.getAttributeValue(i))).append("\t");
+                    } else {
+                        dumpWriter.append("NULL\t");
+                    }
                 }
+                dumpWriter.append("\n");
+            } catch (IOException e) {
+                throw new DBCException("IOException writing to dumpWriter", e);
             }
-            dumpWriter.append("\n");
-        } catch (IOException e) {
-            throw new DBCException("IOException writing to dumpWriter", e);
         }
     }
 
     @Override
     public void fetchEnd(DBCSession session, DBCResultSet resultSet) throws DBCException {
-        try {
-            dumpWriter.flush();
-        } catch (IOException e) {
-            throw new DBCException("IOException writing to dumpWriter", e);
+        if (dumpWriter != null) {
+            try {
+                dumpWriter.flush();
+            } catch (IOException e) {
+                throw new DBCException("IOException writing to dumpWriter", e);
+            }
         }
     }