diff --git a/executer/kernel/control.c b/executer/kernel/control.c
index 6fb89685..60df3cda 100644
--- a/executer/kernel/control.c
+++ b/executer/kernel/control.c
@@ -87,8 +87,8 @@ static long mcexec_prepare_image(ihk_os_t os,
 
 	wait_event_interruptible(usrdata->wq_prepare, pdesc->status);
 
-	if(pdesc->err == -1){
-		ret = -EFAULT;	
+	if(pdesc->err < 0){
+		ret = pdesc->err;	
 		goto free_out;
 	}
 
diff --git a/executer/kernel/ikc.c b/executer/kernel/ikc.c
index eb2db620..4f1dbed1 100644
--- a/executer/kernel/ikc.c
+++ b/executer/kernel/ikc.c
@@ -35,7 +35,7 @@ static int syscall_packet_handler(struct ihk_ikc_channel_desc *c,
 		break;
 
 	case SCD_MSG_PREPARE_PROCESS_NACKED:
-		mcexec_prepare_ack(__os, pisp->arg, -1);
+		mcexec_prepare_ack(__os, pisp->arg, pisp->err);
 		break;
 
 	case SCD_MSG_SYSCALL_ONESIDE:
diff --git a/executer/kernel/mcctrl.h b/executer/kernel/mcctrl.h
index 36f1a162..88d7a3ff 100644
--- a/executer/kernel/mcctrl.h
+++ b/executer/kernel/mcctrl.h
@@ -24,6 +24,7 @@
 struct ikc_scd_packet {
 	int msg;
 	int ref;
+	int err;
 	unsigned long arg;
 };
 
diff --git a/kernel/host.c b/kernel/host.c
index 147c2b22..cd9e9b9d 100644
--- a/kernel/host.c
+++ b/kernel/host.c
@@ -367,6 +367,7 @@ static int syscall_packet_handler(struct ihk_ikc_channel_desc *c,
 {
 	struct ikc_scd_packet *packet = __packet;
 	struct ikc_scd_packet pckt;
+	int rc;
 
 	switch (packet->msg) {
 	case SCD_MSG_INIT_CHANNEL_ACKED:
@@ -375,10 +376,14 @@ static int syscall_packet_handler(struct ihk_ikc_channel_desc *c,
 		return 0;
 
 	case SCD_MSG_PREPARE_PROCESS:
-		if(process_msg_prepare_process(packet->arg) == 0)
+		if((rc = process_msg_prepare_process(packet->arg)) == 0){
 			pckt.msg = SCD_MSG_PREPARE_PROCESS_ACKED;
-		else
+			pckt.err = 0;
+		}
+		else{
 			pckt.msg = SCD_MSG_PREPARE_PROCESS_NACKED;
+			pckt.err = rc;
+		}
 		pckt.ref = packet->ref;
 		pckt.arg = packet->arg;
 		syscall_channel_send(c, &pckt);
diff --git a/kernel/include/syscall.h b/kernel/include/syscall.h
index 16f8c75a..5622af0e 100644
--- a/kernel/include/syscall.h
+++ b/kernel/include/syscall.h
@@ -73,6 +73,7 @@ struct user_desc {
 struct ikc_scd_packet {
 	int msg;
 	int ref;
+	int err;
 	unsigned long arg;
 };