Complex sentence: Unfortunately it does not understand the nrg file format and is hardcoded to read all nrg files as disc at once (DAO) type causing it to fail on track at once (TAO) type images.
Split into simpler sentences: Unfortunately it does not understand the nrg file format and is hardcoded to read all nrg files as disc at once (DAO) type. This causes it to fail on track at once (TAO) type images.