Seeing as this is before the burn, i didnt think the media mattered. If it does that's probably a good indicator that's what the problem could be.
I thought this popup was ISO based only.
I've just moved to mexico and bought "Verbatim" as I usually do in the UK but it ended up being Sony branded. this is the media info;
TSSTcorp DVD+-RW TS-L632H D400 (ATA)
Current Profile: DVD+R DL
Disc Information:
Status: Empty
State of Last Session: Empty
Erasable: No
Free Sectors: 4,173,824
Free Space: 8,547,991,552 bytes
Free Time: 927:32:74 (MM:SS:FF)
Next Writable Address: 0
MID: MBIPG101-R10-65
Supported Write Speeds: 3x, 4x
DVD±R DL Boundary Information:
L0 Data Zone Capacity: 2,086,912
Changeable: Yes
Physical Format Information (ADIP - L0):
Disc ID: MBIPG101-R10-65
Book Type: DVD+R DL
Part Version: 1
Disc Size: 120mm
Maximum Read Rate: Not Specified
Number of Layers: 2
Track Path: Opposite Track Path (OTP)
Linear Density: 0.293 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 16,580,607
Last Physical Sector in Layer 0: 2,283,519
Physical Format Information (ADIP - L1):
Disc ID: MBIPG101-R10-65
Book Type: DVD+R DL
Part Version: 1
Disc Size: 120mm
Maximum Read Rate: Not Specified
Number of Layers: 2
Track Path: Opposite Track Path (OTP)
Linear Density: 0.293 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 16,580,607
Last Physical Sector in Layer 0: 2,283,519
Physical Format Information (Last Recorded - L0):
Disc ID: MBIPG101-R10-65
Book Type: DVD+R DL
Part Version: 1
Disc Size: 120mm
Maximum Read Rate: Not Specified
Number of Layers: 2
Track Path: Opposite Track Path (OTP)
Linear Density: 0.293 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 16,580,607
Last Physical Sector in Layer 0: 2,283,519
Physical Format Information (Last Recorded - L1):
Disc ID: MBIPG101-R10-65
Book Type: DVD+R DL
Part Version: 1
Disc Size: 120mm
Maximum Read Rate: Not Specified
Number of Layers: 2
Track Path: Opposite Track Path (OTP)
Linear Density: 0.293 um/bit
Track Density: 0.74 um/track
First Physical Sector of Data Area: 196,608
Last Physical Sector of Data Area: 16,580,607
Last Physical Sector in Layer 0: 2,283,519
Performance (Write Speed):
Descriptor 1...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 4173823 (0x003FAFFF)
-> RS: 8,310 KB/s (6x) - WS: 4,155 KB/s (3x)
Descriptor 2...
-> B0: 0x00, B1: 0x00, B2: 0x00, B3: 0x00
-> EL: 4173823 (0x003FAFFF)
-> RS: 8,310 KB/s (6x) - WS: 5,540 KB/s (4x)