diff --git a/data-manager-api/src/main/java/org/orbisgis/datamanagerapi/dataset/ITable.java b/data-manager-api/src/main/java/org/orbisgis/datamanagerapi/dataset/ITable.java
index da1939f8..c6201130 100644
--- a/data-manager-api/src/main/java/org/orbisgis/datamanagerapi/dataset/ITable.java
+++ b/data-manager-api/src/main/java/org/orbisgis/datamanagerapi/dataset/ITable.java
@@ -75,6 +75,7 @@ public interface ITable extends IDataSet {
     /**
      * Get the type of the column from the underlying table.
      *
+     * @param columnName set the name of the column
      * @return The type of the column.
      */
     String getColumnsType(String columnName);
diff --git a/data-manager-api/src/main/java/org/orbisgis/datamanagerapi/datasource/IJdbcDataSource.java b/data-manager-api/src/main/java/org/orbisgis/datamanagerapi/datasource/IJdbcDataSource.java
index 82e770d5..bb00c5f5 100644
--- a/data-manager-api/src/main/java/org/orbisgis/datamanagerapi/datasource/IJdbcDataSource.java
+++ b/data-manager-api/src/main/java/org/orbisgis/datamanagerapi/datasource/IJdbcDataSource.java
@@ -95,7 +95,7 @@ public interface IJdbcDataSource extends IDataSource, GroovyObject {
      *
      * @param tableName Name of the table to check.
      *
-     * @return True if the table is found, false otherwise.
+     * @return True if {@link ITable} is found, false otherwise.
      */
     boolean hasTable(String tableName);
 
diff --git a/data-manager/src/main/java/org/orbisgis/datamanager/JdbcTable.java b/data-manager/src/main/java/org/orbisgis/datamanager/JdbcTable.java
index aa19307d..a97fb83e 100644
--- a/data-manager/src/main/java/org/orbisgis/datamanager/JdbcTable.java
+++ b/data-manager/src/main/java/org/orbisgis/datamanager/JdbcTable.java
@@ -188,7 +188,7 @@ public ResultSetMetaData getMetaData(){
      *
      * @return The parent DataSource.
      */
-    public JdbcDataSource getJdbcDataSource(){
+    protected JdbcDataSource getJdbcDataSource(){
         return jdbcDataSource;
     }
 
diff --git a/data-manager/src/main/java/org/orbisgis/datamanager/h2gis/H2GIS.java b/data-manager/src/main/java/org/orbisgis/datamanager/h2gis/H2GIS.java
index f608fed5..5fa8d16f 100644
--- a/data-manager/src/main/java/org/orbisgis/datamanager/h2gis/H2GIS.java
+++ b/data-manager/src/main/java/org/orbisgis/datamanager/h2gis/H2GIS.java
@@ -243,6 +243,8 @@ public boolean hasTable(String tableName) {
         try {
             return JDBCUtilities.tableExists(connectionWrapper,TableLocation.parse(tableName, true).toString());
         } catch (SQLException ex) {
+            LOGGER.error("Cannot find the table '" + tableName + ".\n" +
+                    ex.getLocalizedMessage());
             return false;
         }
     }
diff --git a/data-manager/src/main/java/org/orbisgis/datamanager/postgis/POSTGIS.java b/data-manager/src/main/java/org/orbisgis/datamanager/postgis/POSTGIS.java
index 9a958103..36b15e72 100644
--- a/data-manager/src/main/java/org/orbisgis/datamanager/postgis/POSTGIS.java
+++ b/data-manager/src/main/java/org/orbisgis/datamanager/postgis/POSTGIS.java
@@ -199,6 +199,8 @@ public boolean hasTable(String tableName) {
         try {
             return JDBCUtilities.tableExists(connectionWrapper,TableLocation.parse(tableName, false).toString());
         } catch (SQLException ex) {
+            LOGGER.error("Cannot find the table '" + tableName + ".\n" +
+                    ex.getLocalizedMessage());
             return false;
         }
     }
diff --git a/data-manager/src/test/groovy/org/orbisgis/datamanager/GroovyH2GISTest.groovy b/data-manager/src/test/groovy/org/orbisgis/datamanager/GroovyH2GISTest.groovy
index ea2f2763..84316919 100644
--- a/data-manager/src/test/groovy/org/orbisgis/datamanager/GroovyH2GISTest.groovy
+++ b/data-manager/src/test/groovy/org/orbisgis/datamanager/GroovyH2GISTest.groovy
@@ -564,7 +564,6 @@ class GroovyH2GISTest {
         h2GIS.getSpatialTable("orbisgis").the_geom.createSpatialIndex()
         assertTrue h2GIS.getSpatialTable("orbisgis").the_geom.indexed
         assertTrue h2GIS.getSpatialTable("orbisgis").the_geom.spatialIndexed
-        h2GIS.getSpatialTable("orbisgis").the_geom.createSpatialIndex()
     }
 
     @Test
@@ -629,5 +628,5 @@ class GroovyH2GISTest {
         """)
         def concat = ""
         println h2GIS.firstRow("select count(*) as nb from h2gis").nb
-    }
+    }   
 }