diff --git a/cdrskin/cdrskin_timestamp.h b/cdrskin/cdrskin_timestamp.h
index 7b14c9d..56bdd54 100644
--- a/cdrskin/cdrskin_timestamp.h
+++ b/cdrskin/cdrskin_timestamp.h
@@ -1 +1 @@
-#define Cdrskin_timestamP "2010.10.15.191717"
+#define Cdrskin_timestamP "2010.10.19.165908"
diff --git a/libburn/async.c b/libburn/async.c
index 60818bf..b47e890 100644
--- a/libburn/async.c
+++ b/libburn/async.c
@@ -644,8 +644,13 @@ void burn_disc_write(struct burn_write_opts *opts, struct burn_disc *disc)
 	d->cancel = 1;
 
 	/* ts A70203 : people have been warned in API specs */
-	if (opts->write_type == BURN_WRITE_NONE)
+	if (opts->write_type == BURN_WRITE_NONE) {
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x0002017c,
+			LIBDAX_MSGS_SEV_FAILURE, LIBDAX_MSGS_PRIO_HIGH,
+			"No valid write type selected", 0, 0);
 		return;
+	}
 
 	if (d->drive_role == 0) {
 		libdax_msgs_submit(libdax_messenger, d->global_index,
diff --git a/libburn/libdax_msgs.h b/libburn/libdax_msgs.h
index 18a5002..71e222d 100644
--- a/libburn/libdax_msgs.h
+++ b/libburn/libdax_msgs.h
@@ -561,6 +561,8 @@ Range "scdbackup"          :  0x00020000 to 0x0002ffff
  0x00020179 (FAILURE,HIGH) = Offset source start address is before end of previous source
  0x0002017a (FAILURE,HIGH) = Expected offset source object as parameter
  0x0002017b (WARNING,HIGH) = Sequential BD-R media likely to soon fail writing
+ 0x0002017c (FAILURE,HIGH) = No valid write type selected
+ 0x0002017d (FATAL,HIGH)   = Invalid file descriptor with stdio pseudo-drive
 
  libdax_audioxtr:
  0x00020200 (SORRY,HIGH)   = Cannot open audio source file
diff --git a/libburn/write.c b/libburn/write.c
index f953ac3..8b82f59 100644
--- a/libburn/write.c
+++ b/libburn/write.c
@@ -2120,9 +2120,11 @@ int burn_stdio_mmc_write(struct burn_drive *d, int start, struct buffer *buf)
 	if (d->cancel)
 		return BE_CANCELLED;
 	if (d->stdio_fd < 0) {
-
-		/* >>> program error */;
-
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x0002017d,
+			LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
+			"Invalid file descriptor with stdio pseudo-drive",
+			0, 0);
 		d->cancel = 1;
 		return BE_CANCELLED;
 	}
@@ -2170,9 +2172,11 @@ int burn_stdio_mmc_dummy_write(struct burn_drive *d, int start,
 int burn_stdio_sync_cache(int fd, struct burn_drive *d, int flag)
 {
 	if (fd < 0) {
-
-		/* >>> program error */;
-
+		libdax_msgs_submit(libdax_messenger, d->global_index,
+			0x0002017d,
+			LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
+			"Invalid file descriptor with stdio pseudo-drive",
+			0, 0);
 		d->cancel = 1;
 		return 0;
 	}