diff --git a/python/obitools3/version.py b/python/obitools3/version.py
index 03915f2..f555b67 100755
--- a/python/obitools3/version.py
+++ b/python/obitools3/version.py
@@ -1,5 +1,5 @@
 major = 3
 minor = 0
-serial= '0-beta13'
+serial= '0-beta13.1'
 
 version ="%d.%02d.%s" % (major,minor,serial)
diff --git a/src/obidmscolumn.h b/src/obidmscolumn.h
index d9599e0..f4cadde 100755
--- a/src/obidmscolumn.h
+++ b/src/obidmscolumn.h
@@ -34,7 +34,7 @@
 #define NB_ELTS_MAX_IF_DEFAULT_NAME (1000000) 	/**< The maximum number of elements per line if the default element names
 										   	   	 *   are used ("0\01\02\0...\0n"), considering ELEMENTS_NAMES_MAX.  // TODO not up to date
 										   	   	 */
-#define COLUMN_GROWTH_FACTOR (2)	 	  		/**< The growth factor when a column is enlarged.
+#define COLUMN_GROWTH_FACTOR (1.3)	 	  		/**< The growth factor when a column is enlarged.
                                 	   	   	   	 */
 #define MAXIMUM_LINE_COUNT (1000000000)   		/**< The maximum line count for the data of a column (1E9). //TODO
                                 	       	   	 */
@@ -505,6 +505,14 @@ index_t obi_column_get_element_index_from_name(OBIDMS_column_p column, const cha
 char* obi_get_elements_names(OBIDMS_column_p column);
 
 
+// TODO
+//char* obi_get_formatted_elements_names(OBIDMS_column_p column);
+
+
+// TODO
+//char* obi_column_formatted_infos(OBIDMS_column_p column);
+
+
 /**
  * @brief Prepares a column to set a value.
  *