Jackie Herrud said a machine at the Longview Recreation Center in Spring Hill repeatedly changed her selection from Democrat Jerri Green to Republican Marsha Blackburn. She said she tried several times before her intended choice appeared.

The experience left Herrud frustrated and worried about whether her vote would be recorded correctly. She said poll workers at the location had heard of similar complaints.

Toni Fitzgerald reported a similar problem at a different Williamson County polling place on Saturday morning. She said the button was difficult to press and that the machine registered another candidate until she kept trying. Fitzgerald said there was no stylus available and that she did not alert a poll worker.

Both voters said they were able to get their intended selections to appear. Fitzgerald said the system printed a record she could review, and she worried that older voters might not notice a mistaken selection.

The Tennessee Secretary of State’s office said it had received one complaint of this kind among approximately 400,000 ballots cast so far in the November election. The office said state voting systems provide several chances to check choices: on the selection screen, on a review screen before the ballot is cast, and on the printed ballot or paper record.

Voters who believe their ballot has an error should notify a poll official before casting it, the office said. It also urged voters to review their selections carefully and to learn about the three proposed constitutional amendments on the ballot before heading to the polls. Information about the amendments is available at GoVoteTN.gov.