The company supplying electronic voting machines has said recent changes announced by the Government will lead to extra costs and extra testing on the equipment.
The Government announced this week that it would allow an easier way for voters to abstain.
The company, Powervote, also said it had not considered fitting the machines with a paper trail, as demanded by critics of the system, as it did not believe it was necessary.
Bruton denies FG e-voting backing
Earlier, former Taoiseach John Bruton hit back at claims that Fine Gael supported electronic voting in the 2002 election.
Yesterday, Fianna Fáil TD Peter Power produced a Fine Gael leaflet from the Meath constituency which said that electronic voting was 'as easy as 1, 2, 3'.
Meath was one of three constituencies that used the system in the general election.
But today Deputy Bruton said the material simply helped people to understand how the system worked - and that he had expressed 'grave reservations' about the matter in a letter to the Taoiseach.
He said he had written privately to Bertie Ahern in the hope that he might change his mind, but now had no option but to publish it because Fianna Fáil had sought to accuse Fine Gael of hypocrisy.
In the letter dated 8 April 2002, Mr Bruton raised a number of concerns, including a request for a paper receipt by the machine to validate the transaction.
