diff --git a/src/obidmscolumn.c b/src/obidmscolumn.c
index 0196141..7e26c86 100644
--- a/src/obidmscolumn.c
+++ b/src/obidmscolumn.c
@@ -835,7 +835,7 @@ OBIDMS_column_p obi_open_column(OBIDMS_p dms, const char* column_name, obiversio
 	// Check endianness?
 
 	// Compute data size from the informations in the header
-	data_size = ((column->header)->line_count) * sizeof((column->header)->data_type);	// TODO line_count for tests, change to lines_used later
+	data_size = ((column->header)->line_count) * sizeof((column->header)->data_type);
 
 	column->data   			 = mmap(NULL,
 			                 	 	data_size,
@@ -900,8 +900,10 @@ OBIDMS_column_p obi_clone_column(OBIDMS_p dms, const char* column_name, obiversi
 	{
 		obi_set_errno(OBICOL_UNKNOWN_ERROR);
 		obidebug(1, "\nError creating the new column when cloning a column");
-		// TODO the new file should be deleted
-		return NULL;
+		// The new file is deleted
+		const char* column_file_name = build_column_file_name(column_name, version_number);
+		if (remove(column_file_name) < 0)
+			obidebug(1, "\nError deleting a bad cloned file");
 	}
 
 	(new_column->header)->cloned_from = version_number;