Hi, I know this thread is over a year old, but I'm having the same problem.
Using NeroCmd 22.214.171.124 w/ Nero API 126.96.36.199, using this commandline:
NeroCmd --write --drivename G --dvd --image DX71000.ISO
I'm still getting the error:
Sorry, your compilation cannot be written on this kind of disc. Please insert a
disc of the correct type or modify the settings of your compilation to make them
compatible with the current disc.
I get the same error when using the GUI - it says it needs a CD-R/RW, and spits out my DVD. But the ISO is 750MB, and won't fit on a 650 or 700MB CD.