Police say they are disappointed that a company has not honoured its obligations to fix problems with special crime-fighting software before it went into liquidation.
The software, which includes the Child Protection Offender Register, cost millions of dollars.
Christchurch-based company Wynyard Group went into voluntary administration last year, and was placed in liquidation earlier this year.
Police chief information officer, Assistant Commisioner Jevon McSkimming, said they have worked closely with administrators and were disappointed obligations were not honoured after they entered into a good faith agreement.
Mr McSkimming said there were no consequences for the child protection offender register as there were new arrangements in place.
The Police Association said while the police have been let down by the failure to fix the faulty crime-fighting software program, it was flawed in the first place.
Its president, Chris Cahill, said the offender register was an important but small part of the program which also included a specific "investigator" tool used to help police investigate serious crime.
He said it was meant to be able to manage serious crime investigations, but it had "fallen over", and was never user-friendly.
"It certainly wasn't the intuitive, state-of-the-art design that police staff were expecting when it was sold to them. It was very hard to use and wasn't really performing the functionality that's required in a large investigation."
Mr Cahill said the association believed the program cost $7 million over the project's lifetime.
"It's pretty disappointing that at the end of that, you've got very little to show for it."
Mr Cahill said the police were let down by Wynyard and its collapse.