diff --git a/src/pcm.c b/src/pcm.c
index 01a4a67..5b5d532 100644
--- a/src/pcm.c
+++ b/src/pcm.c
@@ -118,12 +118,13 @@ static int pcm_check_handle_request(facilities_t* facilities, PCM_t* pcm) {
     mvc->negotiation->choice.reply.acceptedTrajectoriesIds.list.array[0] = malloc(sizeof(long));
     *mvc->negotiation->choice.reply.acceptedTrajectoriesIds.list.array[0] = pt->id;
 
-    asn_enc_rval_t enc = asn_encode_to_buffer(NULL, ATS_UNALIGNED_CANONICAL_PER, &asn_DEF_PCM, pcm_rep, buf, buf_len);
+    asn_enc_rval_t enc = uper_encode_to_buffer(&asn_DEF_PCM, NULL, pcm_rep, buf, buf_len);
     if (enc.encoded == -1) {
         syslog_err("[facilities] [pc] PCM.reply encode failure (%s)", enc.failed_type->name);
         rv = 1;
         goto cleanup;
     }
+    ssize_t pcm_rep_len = (enc.encoded + 7) / 8;
 
     tr = calloc(1, sizeof(TransportRequest_t));
     tr->present = TransportRequest_PR_packet;
@@ -144,9 +145,9 @@ static int pcm_check_handle_request(facilities_t* facilities, PCM_t* pcm) {
 
     bpr->gn.trafficClass = 2;
 
-    bpr->data.buf = malloc(enc.encoded);
-    memcpy(bpr->data.buf, buf, enc.encoded);
-    bpr->data.size = enc.encoded;
+    bpr->data.buf = malloc(pcm_rep_len);
+    memcpy(bpr->data.buf, buf, pcm_rep_len);
+    bpr->data.size = pcm_rep_len;
 
     buf[0] = 4;
     enc = asn_encode_to_buffer(NULL, ATS_CANONICAL_OER, &asn_DEF_TransportRequest, tr, buf+1, buf_len-1);
@@ -181,7 +182,7 @@ static int pcm_check_intersection_detected(facilities_t* facilities, PCM_t* pcm)
     PCM_t* pcm_req = NULL;
     TransportRequest_t* tr = NULL;
 
-    const ssize_t buf_len = 512;
+    const ssize_t buf_len = 1024;
     uint8_t buf[buf_len];
 
     it2s_tender_st_s trajectoryA[TRAJECTORY_MAX_LEN+1]; /* ego trajectory */
@@ -262,12 +263,13 @@ static int pcm_check_intersection_detected(facilities_t* facilities, PCM_t* pcm)
     pt->priority = 1;
     pt->id = 0;
 
-    asn_enc_rval_t enc = asn_encode_to_buffer(NULL, ATS_UNALIGNED_CANONICAL_PER, &asn_DEF_PCM, pcm_req, buf, buf_len);
+    asn_enc_rval_t enc = uper_encode_to_buffer(&asn_DEF_PCM, NULL, pcm_req, buf, buf_len);
     if (enc.encoded == -1) {
         syslog_err("[facilities] [pc] PCM.request encode failure (%s)", enc.failed_type->name);
         rv = 1;
         goto cleanup;
     }
+    ssize_t pcm_req_len = (enc.encoded + 7) / 8;
 
     tr = calloc(1, sizeof(TransportRequest_t));
     tr->present = TransportRequest_PR_packet;
@@ -288,9 +290,9 @@ static int pcm_check_intersection_detected(facilities_t* facilities, PCM_t* pcm)
 
     bpr->gn.trafficClass = 2;
 
-    bpr->data.buf = malloc(enc.encoded);
-    memcpy(bpr->data.buf, buf, enc.encoded);
-    bpr->data.size = enc.encoded;
+    bpr->data.buf = malloc(pcm_req_len);
+    memcpy(bpr->data.buf, buf, pcm_req_len);
+    bpr->data.size = pcm_req_len;
 
     buf[0] = 4;
     enc = asn_encode_to_buffer(NULL, ATS_CANONICAL_OER, &asn_DEF_TransportRequest, tr, buf+1, buf_len-1);
@@ -354,6 +356,7 @@ int pcm_check(void* fc, PCM_t* pcm) {
             if (mvc->negotiation) {
                 switch (mvc->negotiation->present) {
                     case CoordinationNegotiation_PR_request:
+                        syslog_err("received PCM.request");
                         pcm_check_handle_request(facilities, pcm);
                         break; 
                     case CoordinationNegotiation_PR_reply: