diff --git a/openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c b/openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c
index 80d6d13d9e..cb395ff4af 100644
--- a/openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c
+++ b/openair1/PHY/NR_TRANSPORT/nr_dlsch_coding.c
@@ -328,8 +328,7 @@ int nr_dlsch_encoding(PHY_VARS_gNB *gNB,
   uint16_t nb_rb = rel15->rbSize;
   uint8_t nb_symb_sch = rel15->NrOfSymbols;
   uint32_t A, Kb, F=0;
-  static uint32_t Z = 0;
-  uint32_t *Zc = &Z;
+  uint32_t *Zc = &dlsch->harq_processes[harq_pid]->Z;
   uint8_t mod_order = rel15->qamModOrder[0];
   uint16_t Kr=0,r;
   uint32_t r_offset=0;
diff --git a/openair1/PHY/NR_UE_TRANSPORT/nr_transport_ue.h b/openair1/PHY/NR_UE_TRANSPORT/nr_transport_ue.h
index a3e202d4fe..90f39badfc 100644
--- a/openair1/PHY/NR_UE_TRANSPORT/nr_transport_ue.h
+++ b/openair1/PHY/NR_UE_TRANSPORT/nr_transport_ue.h
@@ -141,6 +141,8 @@ typedef struct {
   uint8_t decode_phich;
   // Encoder BG
   uint8_t BG;
+  // LDPC lifting size
+  uint32_t Z;
 } NR_UL_UE_HARQ_t;
 
 typedef struct {
diff --git a/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_coding.c b/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_coding.c
index fdd40feeba..6c0881c564 100644
--- a/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_coding.c
+++ b/openair1/PHY/NR_UE_TRANSPORT/nr_ulsch_coding.c
@@ -227,8 +227,7 @@ int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
   NR_UL_UE_HARQ_t *harq_process; 
   uint16_t nb_rb ;
   uint32_t A, F;
-  static uint32_t Z = 0;
-  uint32_t *pz = &Z; 
+  uint32_t *pz; 
   uint8_t mod_order; 
   uint16_t Kr,r;
   uint32_t r_offset;
@@ -249,7 +248,7 @@ int nr_ulsch_encoding(NR_UE_ULSCH_t *ulsch,
   harq_process = ulsch->harq_processes[harq_pid];
   nb_rb = harq_process->pusch_pdu.rb_size;
   A = harq_process->pusch_pdu.pusch_data.tb_size*8;
-  pz = &Z;
+  pz = &harq_process->Z;
   mod_order = nr_get_Qm_ul(harq_process->pusch_pdu.mcs_index, harq_process->pusch_pdu.mcs_table);
   R = nr_get_code_rate_ul(harq_process->pusch_pdu.mcs_index, harq_process->pusch_pdu.mcs_table);
   Kr=0;
diff --git a/openair1/PHY/defs_gNB.h b/openair1/PHY/defs_gNB.h
index b6ffd06c2b..366ac7d178 100644
--- a/openair1/PHY/defs_gNB.h
+++ b/openair1/PHY/defs_gNB.h
@@ -112,6 +112,8 @@ typedef struct {
   uint32_t F;
   /// Encoder BG
   uint8_t BG;
+  /// LDPC lifting size
+  uint32_t Z;
 } NR_DL_gNB_HARQ_t;
 
 typedef struct {
diff --git a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c
index 84ad51f072..76c9dedf30 100644
--- a/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c
+++ b/openair2/LAYER2/NR_MAC_gNB/gNB_scheduler_ulsch.c
@@ -291,7 +291,7 @@ void handle_nr_ul_harq(uint16_t slot, NR_UE_sched_ctrl_t *sched_ctrl, NR_mac_sta
     }
     return;
   } else
-    LOG_E(MAC,"Incorrect ULSCH HARQ process %d or invalid state %d\n",hrq_id,cur_harq->state);
+    LOG_W(MAC,"Incorrect ULSCH HARQ process %d or invalid state %d (ignore this warning for RA)\n",hrq_id,cur_harq->state);
 }
 
 /*