diff --git a/src/requests.c b/src/requests.c
index bde2503..56a27ef 100644
--- a/src/requests.c
+++ b/src/requests.c
@@ -531,7 +531,7 @@ int facilities_request_chaininfo_set(facilities_t* facilities, void* responder,
     
     pthread_mutex_lock(&facilities->coordination.lock);
     facilities->coordination.chain.id = cis->id;
-    memcpy(facilities->coordination.chain.link, cis->link.buf, 8);
+    memcpy(facilities->coordination.chain.link, cis->link.buf, cis->link.size);
     // TODO region
     pthread_mutex_unlock(&facilities->coordination.lock);
 
diff --git a/src/vcm.c b/src/vcm.c
index c0feae7..2fd0860 100644
--- a/src/vcm.c
+++ b/src/vcm.c
@@ -35,6 +35,8 @@ static int are_vehicles_intersecting(
 //            B2[1] = tB[b+1].longitude;
 
 //            if (it2s_tender_do_segments_intersect(A1, A2, B1, B2)) {
+//                printf("tA[a].lat=%d tA[a].lon=%d tB[b].lat=%d tB[b].lon=%d tA[a].ts=%ld tB[b].ts=%ld\n",
+//                        tA[a].latitude, tA[a].longitude, tB[b].latitude, tB[b].longitude, tA[a].timestamp, tB[b].timestamp); fflush(stdout);
             if (it2s_tender_is_inside_circle(tA[a].latitude, tA[a].longitude, tB[b].latitude, tB[b].longitude, 8, DCM_HAVERSINE)) {
                 if (tA[a].timestamp < tB[b].timestamp + 2000 &&
                     tA[a].timestamp > tB[b].timestamp - 2000) {
@@ -103,9 +105,9 @@ static int vcm_check_handle_request(facilities_t* facilities, VCM_t* vcm, mc_nei
     if (coordination->chain.id) {
         vcm_rep->vcm.chain = calloc(1, sizeof(ChainInformation_t));
         vcm_rep->vcm.chain->id = coordination->chain.id;
-        vcm_rep->vcm.chain->link.buf = malloc(8);
-        vcm_rep->vcm.chain->link.size = 8;
-        memcpy(vcm_rep->vcm.chain->link.buf, coordination->chain.link, 8);
+        vcm_rep->vcm.chain->link.buf = malloc(32);
+        vcm_rep->vcm.chain->link.size = 32;
+        memcpy(vcm_rep->vcm.chain->link.buf, coordination->chain.link, 32);
         vcm_rep->vcm.chain->area.present = ChainGeoRegion_PR_circle;
     }
 
@@ -302,9 +304,9 @@ static int vcm_check_intersection_detected(facilities_t* facilities, VCM_t* vcm,
     if (coordination->chain.id) {
         vcm_req->vcm.chain = calloc(1, sizeof(ChainInformation_t));
         vcm_req->vcm.chain->id = coordination->chain.id;
-        vcm_req->vcm.chain->link.buf = malloc(8);
-        vcm_req->vcm.chain->link.size = 8;
-        memcpy(vcm_req->vcm.chain->link.buf, coordination->chain.link, 8);
+        vcm_req->vcm.chain->link.buf = malloc(32);
+        vcm_req->vcm.chain->link.size = 32;
+        memcpy(vcm_req->vcm.chain->link.buf, coordination->chain.link, 32);
         vcm_req->vcm.chain->area.present = ChainGeoRegion_PR_circle;
     }
 
@@ -514,7 +516,7 @@ int vcm_check(void* fc, VCM_t* vcm) {
                 }
 
                 if (intersecting) {
-                    syslog_info("[facilities] [vc] intersection danger with %ld @ (%f, %f) in %ld ms", 
+                    syslog_info("[facilities] [vc] intersection danger with %lld @ (%f, %f) in %ld ms", 
                             vcm->header.stationID, 
                             trajectoryA[index].latitude/1.0e7, 
                             trajectoryA[index].longitude/1.0e7, 
@@ -572,9 +574,9 @@ static int mk_vcm(facilities_t* facilities, uint8_t* vcm_uper, uint16_t* vcm_upe
     if (coordination->chain.id) {
         vcm->vcm.chain = calloc(1, sizeof(ChainInformation_t));
         vcm->vcm.chain->id = coordination->chain.id;
-        vcm->vcm.chain->link.buf = malloc(8);
-        vcm->vcm.chain->link.size = 8;
-        memcpy(vcm->vcm.chain->link.buf, coordination->chain.link, 8);
+        vcm->vcm.chain->link.buf = malloc(32);
+        vcm->vcm.chain->link.size = 32;
+        memcpy(vcm->vcm.chain->link.buf, coordination->chain.link, 32);
         vcm->vcm.chain->area.present = ChainGeoRegion_PR_circle;
     }
 
diff --git a/src/vcm.h b/src/vcm.h
index 07179d3..d8a6070 100644
--- a/src/vcm.h
+++ b/src/vcm.h
@@ -32,7 +32,7 @@ typedef struct coordination {
 
     struct {
         uint64_t id;
-        uint8_t link[8];
+        uint8_t link[32];
         it2s_tender_region_t region;
     } chain;