diff --git a/cdrskin/cdrskin_timestamp.h b/cdrskin/cdrskin_timestamp.h
index 3abb1fe..e6df708 100644
--- a/cdrskin/cdrskin_timestamp.h
+++ b/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2024.03.03.152344"
+#define Cdrskin_timestamP "2024.03.03.201314"
diff --git a/libburn/mmc.c b/libburn/mmc.c
index 13c739a..dc011fd 100644
--- a/libburn/mmc.c
+++ b/libburn/mmc.c
@@ -946,11 +946,11 @@ static int print_time(int flag)
 #endif /* Libburn_write_time_debuG */
 
 
-int mmc_write(struct burn_drive *d, int start, struct buffer *buf)
+int mmc_write(struct burn_drive *d, off_t start_long, struct buffer *buf)
 {
 	int cancelled;
 	struct command *c;
-	int len, key, asc, ascq;
+	int len, key, asc, ascq, start;
 	char *msg = NULL;
 
 #ifdef Libburn_write_time_debuG
@@ -962,6 +962,16 @@ fprintf(stderr, "libburn_DEBUG: buffer sectors= %d  bytes= %d\n",
         buf->sectors, buf->bytes);
 */
 
+	if (start_long > (off_t) 0x7fffffff) {
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+				0x0002012d,
+				LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
+			"Exceeding range of signed integer block addresses",
+				0, 0);
+		d->cancel = 1;
+		return BE_CANCELLED;
+	}
+	start = start_long;
 
 	c = &(d->casual_command);
 
@@ -991,7 +1001,7 @@ fprintf(stderr, "libburn_DEBUG: buffer sectors= %d  bytes= %d\n",
 			sprintf(msg,
 		"Exceeding range of permissible write addresses (%d >= %d)",
 				start, d->media_lba_limit);
-		libdax_msgs_submit(libdax_messenger, d->global_index,
+			libdax_msgs_submit(libdax_messenger, d->global_index,
 				0x0002012d,
 				LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
 				msg, 0, 0);
diff --git a/libburn/mmc.h b/libburn/mmc.h
index 0aa214f..328bb4f 100644
--- a/libburn/mmc.h
+++ b/libburn/mmc.h
@@ -27,7 +27,7 @@ void mmc_close_disc(struct burn_write_opts *o);
 
 void mmc_close(struct burn_drive *, int session, int track);
 void mmc_get_event(struct burn_drive *);
-int mmc_write(struct burn_drive *, int start, struct buffer *buf);
+int mmc_write(struct burn_drive *, off_t start, struct buffer *buf);
 void mmc_write_12(struct burn_drive *d, int start, struct buffer *buf);
 void mmc_sync_cache(struct burn_drive *);
 void mmc_load(struct burn_drive *);
diff --git a/libburn/transport.h b/libburn/transport.h
index 88947ad..b9beca1 100644
--- a/libburn/transport.h
+++ b/libburn/transport.h
@@ -335,7 +335,7 @@ struct burn_drive
 
 	int stdio_fd;
 
-	int nwa;		/* next writeable address */
+	off_t nwa;		/* next writeable address */
 	int alba;		/* absolute lba */
 	int rlba;		/* relative lba in section */
 	int start_lba;
@@ -467,7 +467,7 @@ struct burn_drive
 	/* ts A61021 */
 	void (*read_atip) (struct burn_drive *);
 
-	int (*write) (struct burn_drive *, int, struct buffer *);
+	int (*write) (struct burn_drive *, off_t, struct buffer *);
 	void (*read_toc) (struct burn_drive *);
 	void (*lock) (struct burn_drive *);
 	void (*unlock) (struct burn_drive *);
diff --git a/libburn/write.c b/libburn/write.c
index a210154..b1cfae6 100644
--- a/libburn/write.c
+++ b/libburn/write.c
@@ -1027,7 +1027,7 @@ static int burn_write_leadin_cdtext(struct burn_write_opts *o,
 			}
 #endif /* Libburn_debug_cd_texT */
 	
-			err = d->write(d, write_lba, buf);
+			err = d->write(d, (off_t) write_lba, buf);
 			if (err == BE_CANCELLED)
 				{ ret = 0; goto ex; }
 			write_lba += sectors;
@@ -1074,10 +1074,10 @@ ex:;
 }
 
 
-/* ts A61218 : outsourced from burn_write_track() */
+/* ts A61218 / C40303 : outsourced from burn_write_track() */
 int burn_disc_init_track_status(struct burn_write_opts *o,
 				struct burn_session *s, struct burn_track *t,
-				int tnum, int sectors)
+				int tnum, off_t sectors)
 {
 	struct burn_drive *d = o->drive;
 
@@ -1179,8 +1179,8 @@ int burn_write_track(struct burn_write_opts *o, struct burn_session *s,
 
 		/* <<< */
 		sprintf(msg, 
-	"TAO pre-track %2.2d : get_nwa(%d)=%d, d=%d , demand=%.f , cap=%.f\n",
-			tnum+1, nwa, ret, d->nwa,
+	"TAO pre-track %2.2d : get_nwa(%d)=%d, d=%.f , demand=%.f , cap=%.f\n",
+			tnum+1, nwa, ret, (double) d->nwa,
 			(double) burn_track_get_sectors_2(t, 1) * 2048.0,
 			(double) d->media_capacity_remaining);
 		libdax_msgs_submit(libdax_messenger, d->global_index,
@@ -1209,7 +1209,7 @@ int burn_write_track(struct burn_write_opts *o, struct burn_session *s,
 		{ ret = 0; goto ex; }
 	open_ended = burn_track_is_open_ended(t);
 
-	burn_disc_init_track_status(o, s, t, tnum, sectors);
+	burn_disc_init_track_status(o, s, t, tnum, (off_t) sectors);
 
 	/* ts A61030 : this cannot happen. tnum is always < s->tracks */
 	if (tnum == s->tracks)
@@ -1570,8 +1570,8 @@ int burn_disc_open_track_dvd_minus_r(struct burn_write_opts *o,
 	d->send_write_parameters(d, NULL, -1, o);
 	ret = d->get_nwa(d, -1, &lba, &nwa);
 	sprintf(msg, 
-		"DVD pre-track %2.2d : get_nwa(%d), ret= %d , d->nwa= %d",
-		tnum+1, nwa, ret, d->nwa);
+		"DVD pre-track %2.2d : get_nwa(%d), ret= %d , d->nwa= %.f",
+		tnum+1, nwa, ret, (double) d->nwa);
 	libdax_msgs_submit(libdax_messenger, d->global_index, 0x00000002,
 			LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_ZERO, msg,0,0);
 	if (nwa > d->nwa)
@@ -1632,8 +1632,8 @@ int burn_disc_open_track_dvd_plus_r(struct burn_write_opts *o,
 	BURN_ALLOC_MEM(msg, char, 160);
 	ret = d->get_nwa(d, -1, &lba, &nwa);
 	sprintf(msg, 
-		"DVD+R pre-track %2.2d : get_nwa(%d), ret= %d , d->nwa= %d",
-		tnum+1, nwa, ret, d->nwa);
+		"DVD+R pre-track %2.2d : get_nwa(%d), ret= %d , d->nwa= %.f",
+		tnum+1, nwa, ret, (double) d->nwa);
 	libdax_msgs_submit(libdax_messenger, d->global_index, 0x00000002,
 			LIBDAX_MSGS_SEV_DEBUG, LIBDAX_MSGS_PRIO_ZERO, msg,0,0);
 	if (nwa > d->nwa)
@@ -1936,7 +1936,7 @@ int burn_dvd_write_track(struct burn_write_opts *o,
 
 	/* (offset padding is done within sector_data()) */
 
-	burn_disc_init_track_status(o, s, t, tnum, sectors);
+	burn_disc_init_track_status(o, s, t, tnum, (off_t) sectors);
 	for (i = 0; open_ended || i < sectors; i++) {
 
 		/* From time to time inquire drive buffer */
@@ -2233,7 +2233,8 @@ int burn_disc_setup_dvd_minus_rw(struct burn_write_opts *o,
 	if (o->start_byte >= 0) {
 		d->nwa = o->start_byte / 32768; /* align to 32 kB */
 
-		sprintf(msg, "Write start address is  %d * 32768", d->nwa);
+		sprintf(msg, "Write start address is  %.f * 32768",
+			(double) d->nwa);
 		libdax_msgs_submit(libdax_messenger, d->global_index,
 				0x00020127,
 				LIBDAX_MSGS_SEV_NOTE, LIBDAX_MSGS_PRIO_HIGH,
@@ -2335,8 +2336,8 @@ int burn_dvd_write_sync(struct burn_write_opts *o,
 		d->nwa = 0;
 		if (o->start_byte >= 0) {
 			d->nwa = o->start_byte / 2048;
-			sprintf(msg, "Write start address is  %d * 2048",
-				d->nwa);
+			sprintf(msg, "Write start address is  %.f * 2048",
+				(double) d->nwa);
 			libdax_msgs_submit(libdax_messenger, d->global_index,
 				0x00020127,
 				LIBDAX_MSGS_SEV_NOTE, LIBDAX_MSGS_PRIO_HIGH,
@@ -2658,7 +2659,7 @@ ex:;
 
 
 /* ts A70910 : to be used as burn_drive.write(), emulating mmc_write() */
-int burn_stdio_mmc_write(struct burn_drive *d, int start, struct buffer *buf)
+int burn_stdio_mmc_write(struct burn_drive *d, off_t start, struct buffer *buf)
 {
 	int ret;
 	off_t start_byte;
@@ -2701,7 +2702,7 @@ int burn_stdio_mmc_write(struct burn_drive *d, int start, struct buffer *buf)
 
 /* ts A70910 : to be used as burn_drive.write(),
                emulating mmc_write() with simulated writing. */
-int burn_stdio_mmc_dummy_write(struct burn_drive *d, int start,
+int burn_stdio_mmc_dummy_write(struct burn_drive *d, off_t start,
 							struct buffer *buf)
 {
 	if (d->cancel)
@@ -2846,11 +2847,7 @@ int burn_stdio_write_track(struct burn_write_opts *o, struct burn_session *s,
 	sectors = burn_track_get_sectors_2_v2(t, 1);
 	if (sectors < 0)
 		{ret = 0; goto ex;}
-
-	/* >>> (int) cast will be removed when burn_disc_init_track_status()
-	   >>> gets off_t sectors */;
-	burn_disc_init_track_status(o, s, t, tnum, (int) sectors);
-
+	burn_disc_init_track_status(o, s, t, tnum, sectors);
 	open_ended = burn_track_is_open_ended(t);
 
 	t->end_on_premature_eoi = (o->write_type == BURN_WRITE_TAO);