diff --git a/auxiliary/denoise.c b/auxiliary/denoise.c
index 677094c..1cd10a7 100644
--- a/auxiliary/denoise.c
+++ b/auxiliary/denoise.c
@@ -233,7 +233,6 @@ void sureshrink(double *signal,int N,int J,char *wname,char *method,char *ext,ch
 					risk[i] = ((double)dwt_len - 2 * ((double)i + 1) +dsum[i] +
 							dout[i]*((double)dwt_len - 1 -(double) i))/(double)dwt_len;
 				}
-				printf(" \n");
 				min_index = minindex(risk,dwt_len);
 				thr = sqrt(dout[min_index]);
 				td = thr < tv ? thr : tv;
diff --git a/auxiliary/waux.c b/auxiliary/waux.c
index 0626d8b..10ed389 100644
--- a/auxiliary/waux.c
+++ b/auxiliary/waux.c
@@ -116,6 +116,7 @@ void getDWTDetail(wt_object wt, double *detail, int N, int level) {
 
 	if (level > J || level < 1) {
 		printf("The decomposition only has 1,..,%d levels", J);
+		exit(-1);
 	}
 
 	iter = wt->length[0];