diff --git a/NiHao/doc/META-INF/query - nihao.ctx b/NiHao/doc/META-INF/query - nihao.ctx
index 393e674..c3af4c7 100644
--- a/NiHao/doc/META-INF/query - nihao.ctx
+++ b/NiHao/doc/META-INF/query - nihao.ctx
@@ -74,19 +74,19 @@
  insert into nhao_rel_usergroups (userid,groupid) values (1,2);
 }
 
-query nhaologn_getUserByNickPwd engine any type nihao.login.beans.DBUser{
- SELECT id,nick,display FROM nhao_users WHERE nick=#nick# AND pwd=#pwd# AND active=1
+query nhao_getUserByNickPwd engine any type nihao.login.beans.DBUser{
+ SELECT id,nick,name FROM nhao_users WHERE nick=#nick# AND pwd=#pwd# AND active=1
 }
 
-query nhaologn_getUserByNick engine any type nihao.login.beans.DBUser{
- SELECT id,nick,display FROM nhao_users WHERE nick=#nick# AND active=1
+query nhao_getUserByNick engine any type nihao.login.beans.DBUser{
+ SELECT id,nick,name FROM nhao_users WHERE nick=#nick# AND active=1
 }
 
-query nhaologn_getGroupsForUser engine any type nihao.login.Group{
+query nhao_getGroupsForUser engine any type nihao.login.Group{
  SELECT id,name FROM nhao_groups WHERE id IN (SELECT groupid FROM nhao_rel_usergroups WHERE userid=#id#) AND active=1
 }
 
-query nhaologn_getGroupByName engine any type nihao.login.Group{
+query nhao_getGroupByName engine any type nihao.login.Group{
  SELECT id,name FROM nhao_groups WHERE name=##
 }
 
diff --git a/NiHao/release/NiHao-0.8c.jar b/NiHao/release/NiHao-0.8c.jar
index ecf0d63..4695e35 100644
--- a/NiHao/release/NiHao-0.8c.jar
+++ b/NiHao/release/NiHao-0.8c.jar
Binary files differ
diff --git a/NiHao/src/nihao/context/Context.java b/NiHao/src/nihao/context/Context.java
index d2b0bd6..1c24f7f 100644
--- a/NiHao/src/nihao/context/Context.java
+++ b/NiHao/src/nihao/context/Context.java
@@ -564,7 +564,7 @@
 		name = name.toLowerCase();
 		HashMap<String, Query> engines = queries.get(name);
 		if (engines == null)
-			new NiHaoException("Query '" + name + "' not found");
+			throw new NiHaoException("Query '" + name + "' not found");
 		Query result = engines.get(engine);
 		if (result == null && engine != null)
 			result = engines.get(null);
diff --git a/NiHao/src/nihao/log/LogProvider.java b/NiHao/src/nihao/log/LogProvider.java
index 50c5037..8a6bc36 100644
--- a/NiHao/src/nihao/log/LogProvider.java
+++ b/NiHao/src/nihao/log/LogProvider.java
@@ -5,7 +5,7 @@
 import nihao.ProviderInfo;
 
 public abstract class LogProvider extends Provider {
-	private static ProviderInfo info = ProviderInfo.get(LogProvider.class,NilLogProvider.class);
+	private static ProviderInfo info = ProviderInfo.get(LogProvider.class, NilLogProvider.class);
 	private static LogProvider prov;
 
 	public static LogProvider getProvider() {
@@ -49,7 +49,12 @@
 			if (sb.length() > 0)
 				sb.append(' ');
 			if (o instanceof Throwable) {
-
+				Throwable t = (Throwable) o;
+				sb.append('\n');
+				sb.append(t.getClass().getName());
+				sb.append(": ");
+				sb.append(t.getMessage());
+				sb.append('\n');
 			} else
 				sb.append(o);
 		}
diff --git a/NiHao/src/nihao/login/LoginDataManager.java b/NiHao/src/nihao/login/LoginDataManager.java
index c21155a..1326831 100644
--- a/NiHao/src/nihao/login/LoginDataManager.java
+++ b/NiHao/src/nihao/login/LoginDataManager.java
@@ -27,7 +27,7 @@
 		HashMap<String, String> map = new HashMap<String, String>();
 		map.put("nick", nick);
 		map.put("pwd", Conversor.bytesToHex(Hasher.SHA1(Conversor.utf8ToBytes(pwd))));
-		DBUser[] users = selectAs("login_getUserByNickPwd", map, DBUser[].class);
+		DBUser[] users = selectAs("nhao_getUserByNickPwd", map, DBUser[].class);
 		if (users.length == 0)
 			return null;
 		if (users.length > 1)
@@ -38,7 +38,7 @@
 	public User getUserByNick(String nick) {
 		HashMap<String, String> map = new HashMap<String, String>();
 		map.put("nick", nick);
-		DBUser[] users = selectAs("login_getUserByNick", map, DBUser[].class);
+		DBUser[] users = selectAs("nhao_getUserByNick", map, DBUser[].class);
 		if (users.length == 0)
 			return null;
 		if (users.length > 1)
@@ -47,11 +47,11 @@
 	}
 
 	public Group[] getUserGroups(User user) {
-		Group[] result = selectAs("login_getGroupsForUser", user, Group[].class);
+		Group[] result = selectAs("nhao_getGroupsForUser", user, Group[].class);
 		return result;
 	}
 
 	public Group getGroupByName(String name) {
-		return selectAs("login_getGroupByName", name,Group.class);
+		return selectAs("nhao_getGroupByName", name,Group.class);
 	}
 }
diff --git a/NiHao/src/nihao/util/Conversor.java b/NiHao/src/nihao/util/Conversor.java
index 5ad178d..b11c5ce 100644
--- a/NiHao/src/nihao/util/Conversor.java
+++ b/NiHao/src/nihao/util/Conversor.java
@@ -8,6 +8,7 @@
 import java.io.InputStreamReader;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
+import java.io.PrintWriter;
 import java.io.Reader;
 import java.io.StringWriter;
 import java.io.UnsupportedEncodingException;
@@ -240,6 +241,20 @@
 	}
 
 	/**
+	 * Return a string with all the output of an exception (call stack included)
+	 * 
+	 * @param t
+	 *            Throwable
+	 * @return String
+	 */
+	public static String fullExceptionToString(Throwable t) {
+		Writer writer = new StringWriter();
+		PrintWriter printWriter = new PrintWriter(writer);
+		t.printStackTrace(printWriter);
+		return writer.toString();
+	}
+
+	/**
 	 * Controla la excepcion del econding
 	 * 
 	 * @param data