diff --git a/Assembly.cpp b/Assembly.cpp
index 39cc6a1..d012c5b 100644
--- a/Assembly.cpp
+++ b/Assembly.cpp
@@ -20,6 +20,7 @@ void ha_sort_list_by_anchor(overlap_region_alloc *overlap_list);
 
 All_reads R_INF;
 Debug_reads R_INF_FLAG;
+all_ul_t UL_INF;
 
 void get_corrected_read_from_cigar(Cigar_record* cigar, char* pre_read, int pre_length, char* new_read, int* new_length)
 {
@@ -417,31 +418,6 @@ long long push_final_overlaps_increment(ma_hit_t_alloc* paf, ma_hit_t_alloc* rev
     return available_overlaps;
 }
 
-typedef struct {
-	int is_final, save_ov;
-	// chaining and overlapping related buffers
-	UC_Read self_read, ovlp_read;
-	Candidates_list clist;
-	overlap_region_alloc olist;
-    overlap_region_alloc olist_hp;
-	ha_abuf_t *ab;
-    ha_abufl_t *abl;
-	// error correction related buffers
-	int64_t num_read_base, num_correct_base, num_recorrect_base;
-	Cigar_record cigar1;
-	Graph POA_Graph;
-	Graph DAGCon;
-	Correct_dumy correct;
-	haplotype_evdience_alloc hap;
-	Round2_alignment round2;
-    kvec_t_u32_warp b_buf;
-    kvec_t_u64_warp r_buf;
-    kvec_t_u8_warp k_flag;
-    overlap_region tmp_region;
-    ma_utg_v *ua;
-    st_mt_t sp;
-} ha_ovec_buf_t;
-
 ha_ovec_buf_t *ha_ovec_init(int is_final, int save_ov, int is_ug)
 {
 	ha_ovec_buf_t *b;
diff --git a/Assembly.h b/Assembly.h
index 7e61a28..7f37338 100644
--- a/Assembly.h
+++ b/Assembly.h
@@ -2,6 +2,9 @@
 #define __ASSEMBLY__
 #include "CommandLines.h"
 #include "Overlaps.h"
+#include "Process_Read.h"
+#include "Hash_Table.h"
+#include "Correct.h"
 
 #define FORWARD 0
 #define REVERSE_COMPLEMENT (0x8000000000000000)
@@ -14,7 +17,34 @@
 #define RESEED_LEN 2000
 #define RESEED_HP_RATE 0.9
 
+typedef struct {
+	int is_final, save_ov;
+	// chaining and overlapping related buffers
+	UC_Read self_read, ovlp_read;
+	Candidates_list clist;
+	overlap_region_alloc olist;
+    overlap_region_alloc olist_hp;
+	ha_abuf_t *ab;
+    ha_abufl_t *abl;
+	// error correction related buffers
+	int64_t num_read_base, num_correct_base, num_recorrect_base;
+	Cigar_record cigar1;
+	Graph POA_Graph;
+	Graph DAGCon;
+	Correct_dumy correct;
+	haplotype_evdience_alloc hap;
+	Round2_alignment round2;
+    kvec_t_u32_warp b_buf;
+    kvec_t_u64_warp r_buf;
+    kvec_t_u8_warp k_flag;
+    overlap_region tmp_region;
+    ma_utg_v *ua;
+    st_mt_t sp;
+} ha_ovec_buf_t;
+
 int ha_assemble(void);
 void ug_idx_build(ma_ug_t *ug, int hap_n);
+ha_ovec_buf_t *ha_ovec_init(int is_final, int save_ov, int is_ug);
+void ha_ovec_destroy(ha_ovec_buf_t *b);
 
 #endif
diff --git a/Makefile b/Makefile
index 8da074f..8371724 100644
--- a/Makefile
+++ b/Makefile
@@ -76,5 +76,5 @@ hic.o: hic.h
 rcut.o: rcut.h
 horder.o: horder.h
 tovlp.o: tovlp.h
-inter.o: inter.h
+inter.o: inter.h Process_Read.h
 kalloc.o: kalloc.h
\ No newline at end of file
diff --git a/Overlaps.cpp b/Overlaps.cpp
index e20a5d0..e5832bf 100644
--- a/Overlaps.cpp
+++ b/Overlaps.cpp
@@ -31102,6 +31102,13 @@ char *get_outfile_name(char* output_file_name)
     return buf;
 }
 
+void create_ul_info()
+{
+    ug_opt_t opt; memset(&opt, 0, sizeof(opt));
+    ul_load(&opt);
+    exit(1);
+}
+
 void clean_graph(
 int min_dp, ma_hit_t_alloc* sources, ma_hit_t_alloc* reverse_sources, 
 long long n_read, uint64_t* readLen, long long mini_overlap_length, 
@@ -31110,6 +31117,30 @@ float min_ovlp_drop_ratio, float max_ovlp_drop_ratio, char* output_file_name,
 long long bubble_dist, int read_graph, R_to_U* ruIndex, asg_t **sg_ptr, 
 ma_sub_t **coverage_cut_ptr, int debug_g)
 {
+    // if(asm_opt.ar) create_ul_info();
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
     char *o_file = get_outfile_name(output_file_name);
 	ma_sub_t *coverage_cut = *coverage_cut_ptr;
 	asg_t *sg = *sg_ptr;
diff --git a/Overlaps.h b/Overlaps.h
index d393ae1..2bf7342 100644
--- a/Overlaps.h
+++ b/Overlaps.h
@@ -53,7 +53,12 @@
 #define CUT 11
 #define CUT_DIF_HAP 12
 
-
+///query is the read itself
+typedef struct {
+	uint32_t qn, qs, qe;
+	uint32_t tn, ts, te;
+	uint8_t sec:6, el:1, rev:1;
+} ul_ov_t;
 
 
 ///query is the read itself
diff --git a/Process_Read.cpp b/Process_Read.cpp
index c53e0dd..cf70f84 100644
--- a/Process_Read.cpp
+++ b/Process_Read.cpp
@@ -3,6 +3,8 @@
 #include <string.h>
 #include <fcntl.h>
 #include "Process_Read.h"
+#include "htab.h"
+#include "Correct.h"
 
 uint8_t seq_nt6_table[256] = {
     5, 5, 5, 5,  5, 5, 5, 5,  5, 5, 5, 5,  5, 5, 5, 5,
@@ -735,4 +737,198 @@ void destory_Debug_reads(Debug_reads* x)
 	
 	free(x->read_name);
 	fclose(x->fp);
+}
+
+
+void init_all_ul_t(all_ul_t *x, All_reads *hR) {
+	memset(x, 0, sizeof(*x));
+	x->hR = hR; x->mm = 0x7fffffff;
+}
+void destory_all_ul_t(all_ul_t *x, All_reads *hR) {
+	uint64_t i;
+	for (i = 0; i < x->n; i++) {
+		free(x->a[i].n_n); free(x->a[i].N_site.a); 
+		free(x->a[i].r_base.a); free(x->a[i].bb.a);
+	}
+	free(x->a);
+}
+
+void ha_encode_base(uint8_t* dest, char* src, uint64_t src_l, N_t *nn)
+{
+    uint64_t i = 0;
+    uint64_t dest_i = 0;
+    uint8_t tmp = 0;
+    uint8_t c = 0;
+
+    while (i + 4 <= src_l) {
+        tmp = 0;
+
+        c = seq_nt6_table[(uint8_t)src[i]];
+		if (c >= 4) {
+			c = 0; kv_push(uint32_t, *nn, i);
+		}
+		i++;
+        tmp = tmp | (c<<6);
+
+        c = seq_nt6_table[(uint8_t)src[i]];
+		if (c >= 4) {
+			c = 0; kv_push(uint32_t, *nn, i);
+		}
+		i++;
+        tmp = tmp | (c<<4);
+
+        c = seq_nt6_table[(uint8_t)src[i]];
+		if (c >= 4) {
+			c = 0; kv_push(uint32_t, *nn, i);
+		}
+		i++;
+        tmp = tmp | (c<<2);
+
+        c = seq_nt6_table[(uint8_t)src[i]];
+		if (c >= 4) {
+			c = 0; kv_push(uint32_t, *nn, i);
+		}
+		i++;
+        tmp = tmp | c;
+
+        dest[dest_i] = tmp;
+
+        dest_i++;
+    }
+
+    //at most 3 bases here
+    uint64_t shift = 6;
+    if (i < src_l) {
+        tmp = 0;
+        while (i < src_l) {
+            c = seq_nt6_table[(uint8_t)src[i]];
+			if (c >= 4) {
+				c = 0; kv_push(uint32_t, *nn, i);
+			}
+			i++;
+            tmp = tmp | (c << shift);
+            shift = shift -2;
+        }
+        
+        dest[dest_i] = tmp;
+        dest_i++;
+    }
+}
+
+#define B4L(x) (((x)>>2)+(((x)&3)?1:0))
+void append_ul_t(all_ul_t *x, uint64_t *rid, char* id, int64_t id_l, char* str, int64_t str_l, ul_ov_t *o, int64_t on) {
+	int64_t i, mine, maxs, ovlp, end;
+	ul_vec_t *p = NULL;
+	ul_ov_t *z = NULL, *zp = NULL;
+	uc_block_t *b = NULL;
+	if(rid == NULL) {
+		kv_pushp(ul_vec_t, *x, &p);
+		memset(p, 0, sizeof(*p));
+	}
+	else {
+		p = &(x->a[*rid]);
+	}
+
+	if(id && id_l > 0) {
+		free(p->n_n);
+		p->n_l = id_l; MALLOC(p->n_n, p->n_l+1); memcpy(p->n_n, id, id_l); p->n_n[id_l] = '\0';
+	}
+	if(str && str_l > 0) {
+		p->bb.n = p->N_site.n = p->r_base.n = 0;
+		p->rlen = str_l; 
+		
+		if(o == NULL || on == 0) on = 0;
+		for (i = end = 0, zp = NULL; i < on; i++) {
+			z = &(o[i]);
+			if(!z->el) continue;
+			if(zp) {
+				mine = MIN(zp->qe, z->qe); maxs = MAX(zp->qs, z->qs);
+				ovlp = mine - maxs; 
+				if(zp->qe >= z->qe && zp->qs <= z->qs) continue;
+			} else {
+				ovlp = -z->qs; 
+			}
+			if(ovlp < 0) {///push original bases
+				kv_pushp(uc_block_t, p->bb, &b);
+				b->hid = x->mm; b->rev = 0;
+				b->qs = end; b->qe = b->qs - ovlp;
+				b->ts = p->r_base.n; b->te = b->ts + B4L(-ovlp);
+				kv_resize(uint8_t, p->r_base, b->te); p->r_base.n = b->te;
+				ha_encode_base(p->r_base.a+b->ts, str+b->qs, b->qe-b->qs, &(p->N_site));
+			} 
+
+			///push ovlp bases
+			kv_pushp(uc_block_t, p->bb, &b);
+			b->hid = z->tn; b->rev = z->rev;
+			b->qs = z->qs + (ovlp>0?ovlp:0); b->qe = z->qe;
+			if(z->rev) {
+				b->ts = z->ts; b->te = z->ts + (b->qe - b->qs);
+			} else {
+				b->ts = z->te - (b->qe - b->qs); b->te = z->te;
+			}
+
+			end = MAX(zp?zp->qe:0, z->qe);
+		}
+		
+		if(end < str_l) {///push original bases
+			kv_pushp(uc_block_t, p->bb, &b);
+			b->hid = x->mm; b->rev = 0;
+			b->qs = end; b->qe = str_l;
+			b->ts = p->r_base.n; b->te = b->ts + B4L(b->qe - b->qs);
+			kv_resize(uint8_t, p->r_base, b->te); p->r_base.n = b->te;
+			ha_encode_base(p->r_base.a+b->ts, str+b->qs, b->qe-b->qs, &(p->N_site));
+		}
+	}
+}
+
+
+void retrieve_ul_t(UC_Read* r, all_ul_t *ref, uint64_t ID, uint8_t strand) {
+	ul_vec_t *p = &(ref->a[ID]);
+	uc_block_t *b = NULL;
+	char *a = NULL;
+	uint8_t *src = NULL;
+	int64_t k, i, a_n, l_chr, idx;
+	r->length = p->rlen; r->RID = ID;
+
+	if(r->length + 4 > r->size) {
+        r->size = r->length + 4;
+        r->seq = (char*)realloc(r->seq,sizeof(char)*(r->size));
+    }
+
+	a = NULL; 
+	if(strand == 0) {
+		for (k = 0; k < (int64_t)p->bb.n; k++) {
+			b = &(p->bb.a[k]); a = r->seq + b->qs; a_n = b->qe - b->qs; src = p->r_base.a + b->ts; 
+			if(b->hid == ref->mm){///original bases
+				i = 0;
+				while (i < a_n) {
+					memcpy(a+i, bit_t_seq_table[src[i>>2]], 4);
+					i += 4;
+				}
+			} else {///ovlps
+				recover_UC_Read_sub_region(a, b->ts, b->te - b->ts, b->rev, ref->hR, b->hid);
+			}
+		}
+		for (k = 0; k < (int64_t)p->N_site.n; k++) r->seq[p->N_site.a[k]] = 'N';
+	} else {
+		for (k = 0; k < (int64_t)p->bb.n; k++) {
+			b = &(p->bb.a[k]); a = r->seq + r->length - b->qe; a_n = b->qe - b->qs; src = p->r_base.a + b->ts;
+			if(b->hid == ref->mm){///original bases
+				l_chr = (b->qe - b->qs)&((uint32_t)3);
+				i = ((b->qe - b->qs)>>2)+(l_chr!= 0)-1;
+				idx = 0;
+				if(l_chr > 0) {
+					memcpy(a + idx, bit_t_seq_table_rc[src[i]]+4-l_chr, l_chr);
+					idx = l_chr; i--;
+				}
+				while (i >= 0) {
+					memcpy(a + idx, bit_t_seq_table_rc[src[i]], 4);
+					i--; idx += 4;
+				}
+			} else {///ovlps
+				recover_UC_Read_sub_region(a, b->ts, b->te - b->ts, b->rev==strand?0:1, ref->hR, b->hid);
+			}
+		}
+		for (k = 0; k < (int64_t)p->N_site.n; k++) r->seq[r->length - p->N_site.a[k] - 1] = 'N';
+	}
 }
\ No newline at end of file
diff --git a/Process_Read.h b/Process_Read.h
index 2ab7b42..49a7986 100644
--- a/Process_Read.h
+++ b/Process_Read.h
@@ -156,6 +156,41 @@ typedef struct
     pthread_mutex_t OutputMutex;
 } Debug_reads;
 
+
+typedef struct
+{
+    uint32_t hid:31, rev:1;
+    uint32_t qs, qe, ts, te;
+} uc_block_t;
+
+typedef struct
+{
+    uint32_t *a;
+    ssize_t n ,m;
+} N_t;
+
+typedef struct
+{
+    char *n_n;
+    uint32_t n_l;
+
+    kvec_t(uint8_t) r_base;
+    uint32_t rlen;
+
+    kvec_t(uc_block_t) bb;
+    N_t N_site;
+} ul_vec_t;
+
+typedef struct
+{
+    ul_vec_t *a;
+    size_t n, m;
+    All_reads *hR;
+    uint32_t mm;
+} all_ul_t;
+
+extern all_ul_t UL_INF;
+
 void init_All_reads(All_reads* r);
 void malloc_All_reads(All_reads* r);
 void ha_insert_read_len(All_reads *r, int read_len, int name_len);
@@ -173,4 +208,10 @@ int destory_read_bin(All_reads* r);
 void init_Debug_reads(Debug_reads* x, const char* file);
 void destory_Debug_reads(Debug_reads* x);
 void recover_UC_sub_Read(UC_Read* i_r, long long start_pos, long long length, uint8_t strand, All_reads* R_INF, long long ID);
+
+void init_all_ul_t(all_ul_t *x, All_reads *hR);
+void destory_all_ul_t(all_ul_t *x, All_reads *hR);
+void append_ul_t(all_ul_t *x, uint64_t *rid, char* id, int64_t id_l, char* str, int64_t str_l, ul_ov_t *o, int64_t on);
+void retrieve_ul_t(UC_Read* r, all_ul_t *ref, uint64_t ID, uint8_t strand);
+
 #endif
diff --git a/inter.cpp b/inter.cpp
index 5399458..f723f8a 100644
--- a/inter.cpp
+++ b/inter.cpp
@@ -14,6 +14,8 @@
 #include "htab.h"
 #include "Hash_Table.h"
 #include "Correct.h"
+#include "Process_Read.h"
+#include "Assembly.h"
 KSEQ_INIT(gzFile, gzread)
 
 #define MG_SEED_IGNORE     (1ULL<<41)
@@ -290,6 +292,7 @@ typedef struct { // data structure for each step in kt_pipeline()
     st_mt_t *sps;
 	mg_gchains_t **gcs;
     mg_tbuf_t **buf;
+	ha_ovec_buf_t **hab;
 } utepdat_t;
 
 void init_mg_opt(mg_idxopt_t *opt, int is_HPC, int k, int w, int hap_n)
@@ -2249,6 +2252,137 @@ int alignment_ul_pipeline(uldat_t* sl, const enzyme *fn)
     return 1;
 }
 
+static void *worker_ul_scall_pipeline(void *data, int step, void *in) // callback for kt_pipeline()
+{
+    uldat_t *p = (uldat_t*)data;
+    ///uint64_t total_base = 0, total_pair = 0;
+    if (step == 0) { // step 1: read a block of sequences
+        int ret;
+        uint64_t l;
+		utepdat_t *s;
+		CALLOC(s, 1);
+        s->ha_flt_tab = p->ha_flt_tab; s->ha_idx = p->ha_idx; s->id = p->total_pair; 
+		s->opt = p->opt; s->ug = p->ug; s->uopt = p->uopt; s->rg = p->rg;
+        while ((ret = kseq_read(p->ks)) >= 0) 
+        {
+            if (p->ks->seq.l < (uint64_t)p->opt->k) continue;
+            if (s->n == s->m) {
+                s->m = s->m < 16? 16 : s->m + (s->n>>1);
+                REALLOC(s->len, s->m);
+                REALLOC(s->seq, s->m);
+            }
+			
+			append_ul_t(&UL_INF, NULL, p->ks->name.s, p->ks->name.l, NULL, 0, NULL, 0);		
+            l = p->ks->seq.l;
+            MALLOC(s->seq[s->n], l);
+            s->sum_len += l;
+            memcpy(s->seq[s->n], p->ks->seq.s, l);
+            s->len[s->n++] = l;
+            if (s->sum_len >= p->chunk_size) break;            
+        }
+        p->total_pair += s->n;
+        if (s->sum_len == 0) free(s);
+		else return s;
+    }
+    else if (step == 1) { // step 2: alignment
+        utepdat_t *s = (utepdat_t*)in;
+
+		uint64_t i;
+		CALLOC(s->hab, p->n_thread);
+		for (i = 0; i < p->n_thread; ++i) s->hab[i] = ha_ovec_init(0, 0, 1);
+		///debug
+		/**
+		uint64_t i;
+        CALLOC(s->mzs, p->n_thread);
+        CALLOC(s->sps, p->n_thread);
+		CALLOC(s->gcs, s->n);
+
+		s->buf = (mg_tbuf_t**)calloc(p->n_thread, sizeof(mg_tbuf_t*));
+		for (i = 0; i < p->n_thread; ++i) s->buf[i] = mg_tbuf_init();
+        
+        kt_for(p->n_thread, worker_for_ul_alignment, s, s->n);
+        for (i = 0; i < (uint64_t)s->n; ++i) {
+            free(s->seq[i]);
+            p->total_base += s->len[i];
+        }
+        free(s->seq); free(s->len); 
+		
+		for (i = 0; i < p->n_thread; ++i) {
+			mg_tbuf_destroy(s->buf[i]);
+			free(s->mzs[i].a); free(s->sps[i].a);
+		}
+		**/
+		for (i = 0; i < p->n_thread; ++i) ha_ovec_destroy(s->hab[i]);
+		// free(s->buf); free(s->mzs); free(s->sps);
+		return s;
+    }
+    else if (step == 2) { // step 3: dump
+        utepdat_t *s = (utepdat_t*)in;
+		uint64_t i, rid;
+        for (i = 0; i < (uint64_t)s->n; ++i) {
+			///debug
+			/**
+            // if(s->pos[i].s == (uint64_t)-1) continue;
+            // kv_push(pe_hit, p->hits.a, s->pos[i]);
+			if(!s->gcs[i]) continue;
+			dump_gaf(&(p->hits), s->gcs[i], 1);
+			free(s->gcs[i]->gc); free(s->gcs[i]->a); free(s->gcs[i]->lc); free(s->gcs[i]);
+			**/
+			rid = s->id + i;
+			append_ul_t(&UL_INF, &rid, NULL, 0, s->seq[i], s->len[i], NULL, 0);	
+			free(s->seq[i]); p->total_base += s->len[i];
+        }
+		///debug
+		/**
+        free(s->gcs);
+		**/
+        free(s);
+    }
+    return 0;
+}
+
+int scall_ul_pipeline(uldat_t* sl, const enzyme *fn)
+{
+    double index_time = yak_realtime();
+    int i;
+	init_aux_table();
+
+	init_all_ul_t(&UL_INF, &R_INF);
+    for (i = 0; i < fn->n; i++){
+        gzFile fp;
+        if ((fp = gzopen(fn->a[i], "r")) == 0) return 0;
+        sl->ks = kseq_init(fp);
+        kt_pipeline(3, worker_ul_scall_pipeline, sl, 3);
+        kseq_destroy(sl->ks);
+        gzclose(fp);
+    }
+	sl->hits.total_base = sl->total_base;
+	sl->hits.total_pair = sl->total_pair;
+    fprintf(stderr, "[M::%s::%.3f] ==> Qualification\n", __func__, yak_realtime()-index_time);
+	fprintf(stderr, "[M::%s::%.3f] ==> # reads: %lu, # bases: %lu\n", __func__, yak_realtime()-index_time, 
+							UL_INF.n, sl->total_base);
+	
+    return 1;
+}
+
+
+int print_ul_rs(all_ul_t *U_INF)
+{
+	uint32_t i;
+	ul_vec_t *p = NULL;
+	UC_Read ur;
+	init_UC_Read(&ur);
+	for (i = 0; i < U_INF->n; i++) {
+		p = &(U_INF->a[i]);
+		retrieve_ul_t(&ur, U_INF, i, 0);
+		fprintf(stderr, ">%s\n", p->n_n);
+		fprintf(stderr, "%.*s\n", (int)ur.length, ur.seq);		
+	}
+
+	destory_UC_Read(&ur);
+	return 1;
+}
+
 inline void get_ulname(mg_dbn_t *name, int32_t rid, char **rn, int32_t *rl)
 {
 	(*rn) = name->cc.a + (rid>0?name->a[rid-1]:0);
@@ -2728,4 +2862,33 @@ void ul_resolve(ma_ug_t *ug, const asg_t *rg, const ug_opt_t *uopt, int hap_n)
 	if(exist == 0) uidx_write(ha_flt_tab, ha_idx, asm_opt.output_file_name);
     ul_align(&opt, uopt, rg, asm_opt.ar, ha_flt_tab, ha_idx, ug);
     uidx_destory();
+}
+
+int ul_v_call(mg_idxopt_t *opt, const ug_opt_t *uopt, const asg_t *rg, const enzyme *fn, void *ha_flt_tab, ha_pt_t *ha_idx, ma_ug_t *ug)
+{
+    uldat_t sl; memset(&sl, 0, sizeof(sl));
+    sl.ha_flt_tab = ha_flt_tab;
+    sl.ha_idx = ha_idx;
+    sl.opt = opt;   
+    sl.chunk_size = 500000000;
+    sl.n_thread = asm_opt.thread_num;
+    sl.ug = ug;
+	sl.rg = rg;
+	sl.uopt = uopt;
+	scall_ul_pipeline(&sl, fn);
+	print_ul_rs(&UL_INF);
+	// if(!load_ul_hits(&sl.hits, &sl.nn, asm_opt.output_file_name)) {
+    // 	scall_ul_pipeline(&sl, fn);
+	// 	write_ul_hits(&sl.hits, &sl.nn, asm_opt.output_file_name);
+	// }
+
+	return 1;
+}
+
+void ul_load(const ug_opt_t *uopt)
+{
+	fprintf(stderr, "[M::%s::] ==> UL\n", __func__);
+	mg_idxopt_t opt;
+	init_mg_opt(&opt, 0, 19, 10, 4095);
+	ul_v_call(&opt, uopt, /**rg**/NULL, asm_opt.ar, ha_flt_tab, ha_idx, /**ug**/NULL);
 }
\ No newline at end of file
diff --git a/inter.h b/inter.h
index 6e65d07..d15cce8 100644
--- a/inter.h
+++ b/inter.h
@@ -3,5 +3,6 @@
 #include "Overlaps.h"
 
 void ul_resolve(ma_ug_t *ug, const asg_t *rg, const ug_opt_t *uopt, int hap_n);
+void ul_load(const ug_opt_t *uopt);
 
 #endif