diff --git a/pcu/GPRS_Components.ttcn b/pcu/GPRS_Components.ttcn
index 4446b63..1014498 100644
--- a/pcu/GPRS_Components.ttcn
+++ b/pcu/GPRS_Components.ttcn
@@ -1094,7 +1094,7 @@
 				  arfcn := f_trxnr2arfcn(valueof(nr.trx_nr)), block_nr := nr.blk_nr));
 
 	BTS.receive(tr_PCUIF_DATA_PDTCH(nr.bts_nr,
-					tr_PCUIF_DATA(nr.trx_nr, nr.ts_nr, sapi := PCU_IF_SAPI_PDTCH))
+					tr_PCUIF_DATA(nr.trx_nr, nr.ts_nr, sapi := PCU_IF_SAPI_PDTCH), *)
 		   ) -> value data_msg;
 }
 
@@ -1138,6 +1138,12 @@
 runs on MS_BTS_IFACE_CT {
 	var BTS_PDTCH_Block data_msg;
 	f_pcuif_rx_data_req_pdtch(data_msg, nr := nr);
+
+	if (data_msg.dl_block == omit) {
+		setverdict(fail, "Expected RLCMAC block but received idle block (", data_msg.raw.len, ")");
+		f_shutdown(__BFILE__, __LINE__);
+	}
+
 	dl_block := data_msg.dl_block;
 	dl_fn := data_msg.raw.fn;