diff --git a/CommandLines.cpp b/CommandLines.cpp
index e4e080b..8734c47 100644
--- a/CommandLines.cpp
+++ b/CommandLines.cpp
@@ -45,7 +45,7 @@ void Print_H(hifiasm_opt_t* asm_opt)
 
     fprintf(stderr, "  Trio-partition:\n");
     fprintf(stderr, "    -P FILE       paternal trio index generated by \"yak count\" [NULL]\n");
-    fprintf(stderr, "    -M FILE       Maternal trio index generated by \"yak count\" [NULL]\n");
+    fprintf(stderr, "    -M FILE       maternal trio index generated by \"yak count\" [NULL]\n");
     fprintf(stderr, "    -c INT        lower bound of the binned k-mer's frequency [%d]\n", asm_opt->min_cnt);
     fprintf(stderr, "    -d INT        upper bound of the binned k-mer's frequency [%d]\n", asm_opt->mid_cnt);
 
@@ -253,6 +253,11 @@ int check_option(hifiasm_opt_t* asm_opt)
     // fprintf(stderr, "size of popped small bubbles: %lld\n", asm_opt->small_pop_bubble_size);
     // fprintf(stderr, "size of popped large bubbles: %lld\n", asm_opt->large_pop_bubble_size);
     // fprintf(stderr, "small removed unitig threshold: %d\n", asm_opt->max_short_tip);
+    // fprintf(stderr, "small removed unitig threshold: %d\n", asm_opt->max_short_tip);
+    // fprintf(stderr, "pat_index: %s\n", asm_opt->pat_index);
+    // fprintf(stderr, "mat_index: %s\n", asm_opt->mat_index);
+    // fprintf(stderr, "min_cnt: %d\n", asm_opt->min_cnt);
+    // fprintf(stderr, "mid_cnt: %d\n", asm_opt->mid_cnt);
 
     return 1;
 }
diff --git a/Overlaps.cpp b/Overlaps.cpp
index 71d9d57..c2deb22 100644
--- a/Overlaps.cpp
+++ b/Overlaps.cpp
@@ -25060,11 +25060,14 @@ ma_sub_t* coverage_cut, int debug_g)
 
     asg_arc_del_simple_circle_untig(sources, coverage_cut, sg, 100, 0);
 
-
-    /*******************************for debug***************************************/
-    write_debug_graph(sg, sources, coverage_cut, output_file_name, n_read, reverse_sources, ruIndex);
-    debug_gfa:;
-    /*******************************for debug***************************************/
+    if(VERBOSE_GFA >= 1)
+    {
+        /*******************************for debug***************************************/
+        write_debug_graph(sg, sources, coverage_cut, output_file_name, n_read, reverse_sources, ruIndex);
+        debug_gfa:;
+        /*******************************for debug***************************************/
+    }
+    
     /**
     debug_ma_hit_t(sources, coverage_cut, n_read, max_hang_length, 
     mini_overlap_length);
@@ -25137,20 +25140,23 @@ long long bubble_dist, int read_graph, int write)
     ///actually min_thres = asm_opt.max_short_tip + 1 there are asm_opt.max_short_tip reads
     min_thres = asm_opt.max_short_tip + 1;
 
-
-    if(load_debug_graph(&sg, &sources, &coverage_cut, output_file_name, &reverse_sources, &ruIndex))
+    if(VERBOSE_GFA >= 1)
     {
-        fprintf(stderr, "debug gfa has been loaded\n");
-        
-        clean_graph(min_dp, sources, reverse_sources, n_read, readLen, mini_overlap_length, 
-        max_hang_length, clean_round, gap_fuzz, min_ovlp_drop_ratio, max_ovlp_drop_ratio, 
-        output_file_name, bubble_dist, read_graph, &ruIndex, sg, coverage_cut, 1);
-        asg_destroy(sg);
-        free(coverage_cut);
-        destory_R_to_U(&ruIndex);
-        return;
+        if(load_debug_graph(&sg, &sources, &coverage_cut, output_file_name, &reverse_sources, &ruIndex))
+        {
+            fprintf(stderr, "debug gfa has been loaded\n");
+            
+            clean_graph(min_dp, sources, reverse_sources, n_read, readLen, mini_overlap_length, 
+            max_hang_length, clean_round, gap_fuzz, min_ovlp_drop_ratio, max_ovlp_drop_ratio, 
+            output_file_name, bubble_dist, read_graph, &ruIndex, sg, coverage_cut, 1);
+            asg_destroy(sg);
+            free(coverage_cut);
+            destory_R_to_U(&ruIndex);
+            return;
+        }
     }
     
+    
 
     if (asm_opt.write_index_to_disk && write)
     {