The Ministry of Social Development has "apologised unreservedly" to the court after its shortcomings resulted in a child-abuse trial being aborted last week.
The 61-year-old defendant, who faces 42 counts of physical and sexual abuse of two girls in his care between 1994 and 2003, had been on trial for three days when Justice Paul Heath discharged the jury.
He told jurors in the High Court at Auckland that the situation had come about because of a failure by Child, Youth and Family to submit documents.
"It became apparent that the disclosure was incomplete to the extent that there was something in the order of 300 relevant documents that came to light," Justice Heath said.
The case came back before the court this morning, where lawyers discussed how to progress the matter.