Hundreds of thousands of electric customers have received double billings or experienced other hiccups in their normal monthly billing patterns as a result of a major computer software problem experienced by Dallas-based Oncor Electric Delivery.

Oncor spokeswoman Megan Wright said today that the problem occurred in the period from July 19-29, resulting in Oncor significantly delaying the transfer of electricity consumption data from meter readings to retail electric providers, or REPs, that have customers in Oncor’s sprawling service territory.

“As soon as we realized there was a problem, we started communicating with retailers during those 10 days…we have fixed the problem now, so there won’t be any more problems,” Wright said.

TXU Energy, the largest REP in North Texas, had “many” affected customers, numbering in the thousands, TXU spokesman Michael Patterson said today.

Read the full article at the Fort Worth Star-Telegram.