diff --git a/src/dna_seq_indexer.c b/src/dna_seq_indexer.c
index af5191d..299e36d 100755
--- a/src/dna_seq_indexer.c
+++ b/src/dna_seq_indexer.c
@@ -66,8 +66,13 @@ char* obi_blob_to_seq(Obi_blob_p value_b)
 	// Decode
 	if (value_b->element_size == 2)
 		return decode_seq_on_2_bits(value_b->value, value_b->length_decoded_value);
-	else
+	else //if (value_b->element_size == 4) commented for efficiency reasons
 		return decode_seq_on_4_bits(value_b->value, value_b->length_decoded_value);
+//	else
+//	{
+//		fprintf(stderr, "\n BUG \n");
+//		return NULL;
+//	}
 }
 
 
diff --git a/src/obi_clean.c b/src/obi_clean.c
index 3196707..65163c8 100755
--- a/src/obi_clean.c
+++ b/src/obi_clean.c
@@ -46,7 +46,6 @@
  * Internal function creating the output columns for the obiclean algorithm.
  *
  * @param o_view A pointer on the output view.
- * @param i_view A pointer on the input view.
  * @param sample_column A pointer on the column where sample counts are kept.
  * @param sample_count The number of different samples.
  *