I get an error with nero 7 for DVD-R type DVD: illegal disk, but for other DVD types DVD+r,Double layer,+RW is no problem.
Here is the log of nero:

Windows XP 5.1
IA32
WinAspi: -

NT-SPTI used
Nero Version: 7.10.1.0
Internal Version: 7, 10, 1, 0

Recorder: <SONY DVD RW DW-D22A> Version: BFS1 - HA 1 TA 0 - 7.10.1.0
Adapter driver: <IDE> HA 1
Drive buffer : 2048kB
Bus Type : default (0) -> ATAPI, detected: ?
CD-ROM: <AN5173U ENO311I >Version: 1.0 - HA 1 TA 2 - 7.10.1.0
Adapter driver: <SCSI> HA 1

=== Scsi-Device-Map ===
CdRomPeripheral : SONY DVD RW DW-D22A atapi Port 0 ID 0 DMA: On
CdRomPeripheral : HL-DT-ST DVD-ROM GDR8163B atapi Port 0 ID 1 DMA: On
DiskPeripheral : HDS724040KLSA80 atapi Port 1 ID 0 DMA: On
CdRomPeripheral : AN5173U ENO311I 1.0 a1yd1r6f Port 3 ID 0 DMA: Off

=== CDRom-Device-Map ===
SONY DVD RW DW-D22A E: CdRom0
HL-DT-ST DVD-ROM GDR8163B F: CdRom1
AN5173U ENO311I K: CdRom2
=======================

AutoRun : 1
Excluded drive IDs:
WriteBufferSize: 83886080 (0) Byte
BUFE : 0
Physical memory : 1023MB (1047916kB)
Free physical memory: 508MB (520364kB)
Memory in use : 50 %
Uncached PFiles: 0x0
Use Inquiry : 1
Global Bus Type: default (0)
Check supported media : Disabled (0)

2.9.2007
ISO compilation
13.18.04 #1 Text 0 File SCSIPTICommands.cpp, Line 424
LockMCN - completed sucessfully for IOCTL_STORAGE_MCN_CONTROL

13.18.04 #2 Text 0 File Isodoc.cpp, Line 6666
Iso document burn settings
------------------------------------------
Determine maximum speed : FALSE
Simulate : FALSE
Write : TRUE
Finalize CD : TRUE
Multisession : FALSE
Burning mode : DAO
Mode : 1
ISO Level : 1 (Max. of 11 = 8 + 3 char)
Character set : ISO 9660
Joliet : TRUE
Allow pathdepth more than 8 directories : FALSE
Allow more than 255 characters in path : FALSE
Write ISO9660 ;1 file extensions : TRUE

13.18.05 #3 ISO9660GEN -11 File Geniso.cpp, Line 3343
First writeable address = 0 (0x00000000)

13.18.05 #4 Text 0 File Burncd.cpp, Line 3508
Turn on Disc-At-Once, using DVD media

13.18.05 #5 Text 0 File DlgWaitCD.cpp, Line 307
Last possible write address on media: 2298495 (510:46.45, 4489MB)
Last address to be written: 2149887 (477:45.12, 4198MB)

13.18.05 #6 Text 0 File DlgWaitCD.cpp, Line 319
Write in overburning mode: NO (enabled: CD)

13.18.05 #7 Text 0 File DlgWaitCD.cpp, Line 2972
Recorder: SONY DVD RW DW-D22A, Media type: DVD-R
Disc Manufacturer: TTH02 -
Disc Application Code: 64, Disc Physical Code: 193

13.18.05 #8 Text 0 File DlgWaitCD.cpp, Line 493
>>> Protocol of DlgWaitCD activities: <<<
=========================================

13.18.05 #9 Text 0 File ThreadedTransferInterface.cpp, Line 793
Setup items (after recorder preparation)
0: TRM_DATA_MODE1 ()
2 indices, index0 (150) not provided
original disc pos #0 + 2149888 (2149888) = #2149888/477:45.13
relocatable, disc pos for caching/writing not required/ required
-> TRM_DATA_MODE1, 2048, config 0, wanted index0 0 blocks, length 2149888 blocks [E: SONY DVD RW DW-D22A]
--------------------------------------------------------------

13.18.05 #10 Text 0 File ThreadedTransferInterface.cpp, Line 995
Prepare [E: SONY DVD RW DW-D22A] for write in CUE-sheet-DAO
DAO infos:
==========
MCN: ""
TOCType: 0x00; Session Closed, disc fixated
Tracks 1 to 1: Idx 0 Idx 1 Next Trk
1: TRM_DATA_MODE1, 2048/0x00, FilePos 0 0 4402970624, ISRC ""
DAO layout:
===========
___Start_|____Track_|_Idx_|_CtrlAdr_|_____Size_|______NWA_|_RecDep__________
0 | lead-in | 0 | 0x41 | 0 | 0 | 0x00
0 | 1 | 0 | 0x41 | 0 | 0 | 0x00
0 | 1 | 1 | 0x41 | 2149888 | 0 | 0x00
2149888 | lead-out | 1 | 0x41 | 0 | 0 | 0x00

13.18.05 #11 Text 0 File SCSIPTICommands.cpp, Line 215
SPTILockVolume - completed successfully for FSCTL_LOCK_VOLUME

13.18.05 #12 Text 0 File Burncd.cpp, Line 4294
Caching options: cache CDRom or Network-Yes, small files-No (<64KB)

13.18.05 #13 Phase 24 File dlgbrnst.cpp, Line 1762
Caching of files started

13.18.05 #14 Text 0 File Burncd.cpp, Line 4413
Cache writing successful.

13.18.05 #15 Phase 25 File dlgbrnst.cpp, Line 1762
Caching of files completed

13.18.05 #16 Phase 36 File dlgbrnst.cpp, Line 1762
Burn process started at 4x (5.540 KB/s)

13.18.05 #17 Text 0 File ThreadedTransferInterface.cpp, Line 2721
Verifying disc position of item 0 (relocatable, disc pos, no patch infos, orig at #0): write at #0

13.18.05 #18 Text 0 File DVDR.cpp, Line 3225
Recording mode: Sequential Recording Mode

13.18.05 #19 Text 0 File DVDR.cpp, Line 3381
Start write address at LBA 0
DVD high compatibility mode: Yes

13.18.05 #20 Text 0 File Cdrdrv.cpp, Line 9872
---- Disc Structure: Physical Format Information (00h) ----
Media Type: 0, Layer: 0, Address: 0 (0 h), AGID: 0; Length: 2050
Book Type: DVD-R (2), Part Version: 2.0x (5), Extended Part Version: 2.1 (33)
Disc Size: 120 mm, Maximum Rate: <not specified> (F h)
Number of Layers: 1, Track Path: Parallel Track Path (PTP), Layer Type: recordable
Linear Density: 0,267 um/bit, Track Density: 0,74 um/track
Starting Physical Sector Number of Data Area: 30000 h (DVD-ROM, DVD-R/-RW, DVD+R/+RW)
End Sector Number in Layer 0: 0 h (LBN: FFFD0000 h, 4193920 MB)
Data in Burst Cutting Area (BCA) does not exist
Revision number of maximum recording speed: 6.0
Revision number of minimum recording speed: -
Revision number table of recording speed: 1.0 2.0 3.0 4.0 5.0 - -
Class: 0
Start sector number of the current Border-Out: 0 h
Start sector number of the next Border-In: 0 h
Media Specific [16..63]:
00 60 00 10 20 30 40 50 - 00 00 00 21 00 00 00 00 .`...0@P...!....
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00 ................

13.18.05 #21 Text 0 File ThreadedTransfer.cpp, Line 269
Pipe memory size 83836800

13.18.06 #22 SPTI -1046 File SCSIPassThrough.cpp, Line 179
CdRom0: SCSIStatus(x02) WinError(0) NeroError(-1046)
Sense Key: 0x02 (KEY_NOT_READY)
Sense Code: 0x30
Sense Qual: 0x05
CDB Data: 0x2A 00 00 00 00 00 00 00 20 00 00 00
Sense Area: 0x70 00 02 00 00 00 00 0A 00 00 00 00 30 05
Buffer x090f0040: Len x10000
0x00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

13.18.06 #23 CDR -1046 File Writer.cpp, Line 303
Illegal disc
E: SONY DVD RW DW-D22A

13.18.07 #24 Text 0 File DVDR.cpp, Line 3783
EndDAO: Last written address was -1 (FFFFFFFFh)

13.18.07 #25 Phase 38 File dlgbrnst.cpp, Line 1762
Burn process failed at 4x (5.540 KB/s)

13.18.19 #26 Text 0 File SCSIPTICommands.cpp, Line 261
SPTIDismountVolume - completed successfully for FSCTL_DISMOUNT_VOLUME

13.18.21 #27 Text 0 File Cdrdrv.cpp, Line 11185
DriveLocker: UnLockVolume completed

13.18.21 #28 Text 0 File SCSIPTICommands.cpp, Line 424
UnLockMCN - completed sucessfully for IOCTL_STORAGE_MCN_CONTROL

It is probbably not Nero issue, but burner issue. You should update your burner's firmware.

i have heard so many problems with nero 7 , it seems to be like vista bloated beyond useage.
I have nero 6 and it runs fine

I've downloaded nero 8 and it also has some burning-related issues. Seems that Nero burning rom doesn't install all the necessary drivers for the burner (if you don't install the whole bundle), while Nero express burns without a problem. And I'm talking about same bundle installment. Weired.

HELLO AGAIN
Nero 7 & 8 are just a pain full stop / too much agro.
Like so much other software recently that has got a good reputation & they release a so called new improved version and it turns out to be worse than ever.

Thing I dislike the most with Nero 8 is lack of advanced options. For example, you can no longer make data/audio combo disc. That and interface design are the only real changes between 7 (or 6) and 8.

Don't know if it will work to try to invigorate this thread, but I'm having illegal disk errors too. I'm running a Toshiba Satellite L455-S5975 in which I swapped out the optical drive with a 2012 LG BT20N Blu-Ray burner 2 to 3 years ago. Also running Windows 7 Home and Nero 7. Burned all media like a charm (except for being a tad loud) for a couple of years. Last year it started being unable see files that had been burned on disks with the same burner. Then last month it stopped being able to burn Blu-Ray data disks. It did proceed to burn two DVD data disks before starting to give me the "illegal disk" error. I checked LG's site for a firmware update and found none, so then sent them an email asking if there was a firmware update, but they replied in the negative. So, thinking the drive was bad, I ordered a new one (which actually turned out to be a month older than the one I had). Wouldn't burn a Blu-Ray, stopping about 1/3 of the way through. Burned two dvd's, then started getting the "illegal disk" error. So I'm basically at my wit's end and don't know what else to try. Any suggestions would be greatly appreciated. I do have the error log for the Blu-Ray fail and can quickly make one for the "illegal error" if needed.

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