Updated: Commonwealth Bank business customers were caught out by a glitch in the bank's systems that delayed the processing of an undisclosed file overnight.
A spokesman for the bank told iTnews the bank had "finalised the processing of the late running file" before noon.
"During the file's processing there were brief managed outages of up to 15 minutes to our online channels CommBiz and NetBank," he said.
"The file has now completed processing, all accounts are now up to date and there is no impact to our online channels."
And he said a "small number of retail customers" were also impacted.
He put the number of CBA accounts affected at "up to 5 percent" and that flow-on impacts to CBA's teller-machine network were fixed.
"Customers whose accounts required data from the late running file may have had difficulty accessign cash through ATMs during processing this morning," he said.
"As the file has now been processed, this is no longer an issue."
Earlier, CBA pulled its NetBank online banking platform offline for a half hour to fix the problem.
It also said customers had "reported intermittent issues displaying business accounts on NetBank".
The bank apologised to customers "for any inconvenience caused".