diff --git a/src/libecoprimer/filtering.c b/src/libecoprimer/filtering.c
index 79ba685..0f12492 100644
--- a/src/libecoprimer/filtering.c
+++ b/src/libecoprimer/filtering.c
@@ -117,6 +117,7 @@ static	int32_t *ecoFilteringHashSequence(int32_t *dest,
 		code = encoder[(*base) - 'A'];
 		if (code <0)
 		{
+			//DEBUG_LOG("Error on seq %s @ %d --> %c",seq->AC,j,*base);
 			code = 0;
 			error|= 1;
 		}
@@ -127,9 +128,11 @@ static	int32_t *ecoFilteringHashSequence(int32_t *dest,
 
 		if (!error)
 		{
+     //               DEBUG_LOG("No Error on %s @ %d",seq->AC,j);
 			goodword=(uint32_t)((doublestrand) ? MINI(word,antiword):word);
 			if (!in_last_seq[goodword])
 			{
+       //                         DEBUG_LOG("Store word %s",ecoUnhashWord(goodword,FWORDSIZE))
 				in_last_seq[goodword]=1;
 				dest[goodword]++;
 			}
@@ -169,15 +172,17 @@ int32_t *filteringSeq(pecodnadb_t database, uint32_t seqdbsize,
 	for (i=0;i<*size;i++)
 		if (wordscount[i] >= sequenceQuorum)
 			keep++;
+     //           else if (wordscount[i])
+     //			DEBUG_LOG("Word : %s -> %d",ecoUnhashWord(i,FWORDSIZE),wordscount[i]);
 
 
 	(void)ecoFilteringHashSequence((int32_t*)-1,
-									options->circular,
+					options->circular,
 	                                options->doublestrand,
 	                                NULL,
 	                                NULL);
 
-	fprintf(stderr,"ok\n Considered word of size %d for filtering : %d\n",FWORDSIZE,keep);
+	fprintf(stderr,"ok\n Considered word of size %d for filtering with quorum >= %d : %d\n",FWORDSIZE,sequenceQuorum,keep);
 	return wordscount;
 
 }