diff --git a/SWADroid/src/es/ugr/swad/swadroid/model/DataBaseHelper.java b/SWADroid/src/es/ugr/swad/swadroid/model/DataBaseHelper.java
index 613422a2..39cf038d 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/model/DataBaseHelper.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/model/DataBaseHelper.java
@@ -836,7 +836,7 @@ public class DataBaseHelper {
     public void upgradeDB(Context context) throws XmlPullParserException, IOException {    	
     	//cleanTables();    	
     	//initializeDB();
-    	//compactDB();
+    	compactDB();
     	
     	/*db.getDB().execSQL("CREATE TEMPORARY TABLE __"
                 + Global.DB_TABLE_NOTIFICATIONS
diff --git a/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/Notifications.java b/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/Notifications.java
index 17289556..bc80bc99 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/Notifications.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/modules/notifications/Notifications.java
@@ -185,6 +185,8 @@ public class Notifications extends Module {
 	    sendRequest(Notification.class, false);
 	
 	    if (result != null) {
+	    	dbHelper.beginTransaction();
+	    	
 	        //Stores notifications data returned by webservice response
 			Vector<?> res = (Vector<?>) result;
 	    	SoapObject soap = (SoapObject) res.get(1);
@@ -213,6 +215,8 @@ public class Notifications extends Module {
 			
 			//Clear old notifications to control database size
 			dbHelper.clearOldNotifications(SIZE_LIMIT);
+			
+			dbHelper.endTransaction();
 	    }
 	}
 
diff --git a/SWADroid/src/es/ugr/swad/swadroid/modules/tests/TestsConfigDownload.java b/SWADroid/src/es/ugr/swad/swadroid/modules/tests/TestsConfigDownload.java
index 462ea692..f44e1451 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/modules/tests/TestsConfigDownload.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/modules/tests/TestsConfigDownload.java
@@ -260,9 +260,7 @@ public class TestsConfigDownload extends Module {
 	protected void postConnect() {
 		if(numQuestions == 0) {
 			Toast.makeText(this, R.string.noQuestionsAvailableTestsDownloadMsg, Toast.LENGTH_LONG).show();		
-		}
-
-		if(!isPluggable) {
+		} else if(!isPluggable) {
         	Toast.makeText(this, R.string.noQuestionsPluggableTestsDownloadMsg, Toast.LENGTH_LONG).show();
 		}
 		
diff --git a/SWADroid/src/es/ugr/swad/swadroid/modules/tests/TestsQuestionsDownload.java b/SWADroid/src/es/ugr/swad/swadroid/modules/tests/TestsQuestionsDownload.java
index 9e73238f..c4277f52 100644
--- a/SWADroid/src/es/ugr/swad/swadroid/modules/tests/TestsQuestionsDownload.java
+++ b/SWADroid/src/es/ugr/swad/swadroid/modules/tests/TestsQuestionsDownload.java
@@ -151,13 +151,10 @@ public class TestsQuestionsDownload extends Module {
 		    			Log.d(TAG, "UPDATED: " + q.toString());
 	            }
 	        }
-	        
-	        dbHelper.endTransaction();	        
+	                
 			Log.i(TAG, "Retrieved " + listSize + " questions");
             
-			//Read answers info from webservice response
-			dbHelper.beginTransaction();
-			
+			//Read answers info from webservice response			
 	    	listSize = answersListObject.getPropertyCount();
 	        for (int i = 0; i < listSize; i++) {
 	            SoapObject pii = (SoapObject)answersListObject.getProperty(i);
@@ -184,12 +181,9 @@ public class TestsQuestionsDownload extends Module {
             	}
 	        }
 	        
-	        dbHelper.endTransaction();
 			Log.i(TAG, "Retrieved " + listSize + " answers");
             
-			//Read relationships between questions and tags from webservice response
-			dbHelper.beginTransaction();
-			
+			//Read relationships between questions and tags from webservice response			
 	    	listSize = questionTagsListObject.getPropertyCount();
 	        for (int i = 0; i < listSize; i++) {
 	            SoapObject pii = (SoapObject)questionTagsListObject.getProperty(i);
@@ -220,7 +214,6 @@ public class TestsQuestionsDownload extends Module {
 	            }
 	        }
 		    
-		    dbHelper.endTransaction();
 			Log.i(TAG, "Retrieved " + listSize + " relationships between questions and tags");
 			
 			//Update last time test was updated
@@ -228,6 +221,7 @@ public class TestsQuestionsDownload extends Module {
 			Test testConfig = oldTestConfigDB;
 			testConfig.setEditTime(System.currentTimeMillis() / 1000L);
 			dbHelper.updateTestConfig(oldTestConfigDB, testConfig);
+		    dbHelper.endTransaction();
 	    }
         
         //Request finalized without errors