Queensland Health Minister Steven Miles insists major problems with new ordering software in the state’s hospitals are due to "user error" and not a problem with the multimillion-dollar system itself.

The $135 million software was commissioned to replace supply-ordering software that was more than 20 years old.

Health Minister Steven Miles says user error is to blame for issues with a new hospital supply ordering system launched last week. Credit:AAP Image/ Dan Peled

Reports emerged on Friday that staff had been forced to buy supplies manually using credit cards and stockpile essentials such as bandages after the new S/4HANA system crashed soon after launching on August 1.

Mr Miles denied the issued were caused by a crash, and said while there had been “teething issues” with the system, they were mostly due to user error.