A Tesla logo on a Model S is photographed in a Tesla dealer in New York, USA, 29 April 2016. REUTERS / Lucas Jackson / File Photo

NEW YORK / SAN FRANCISCO, Oct. 24 (Reuters) – U.S. electric car maker Tesla Inc (TSLA.O) rolled back the latest version of its Full Self-Driving (FSD) beta software less than a day after it was released on Sunday . after users complained about false collision warnings and other issues.

The setback comes as Tesla is subject to regulatory scrutiny over the safety of its semi-autonomous driving technology it calls “FSD”.

“I’m seeing some problems with 10.3 and so I’m temporarily going back to 10.2,” Chief Executive Elon Musk said in a Twitter post on Sunday.

“Please note that this is to be expected with beta software. It is impossible to test all hardware configurations under all conditions with internal QA (quality assurance), hence public beta,” he said.

Tesla did not immediately respond to requests for comment outside of normal US business hours.

The release of the new driver assistance system for some owners of Tesla models, which the company said had several improvements, was announced for Friday, October 22nd.

On Saturday, Musk said the release would likely be delayed by a day.

“Regression in some left turns at traffic lights found by internal QA in 10.3. Correction in progress, likely to be published tomorrow,” he tweeted on Saturday.

The Tesla vehicles with the latest 10.3 software were repeatedly providing forward collision warnings when there was no imminent danger, according to video posts from beta users. Some vehicles also automatically braked for no reason, users said in social media posts.

Some users said they completely lost the FSD beta software after experiencing issues with the latest iteration.

There was no information on Sunday about a possible new date for the publication, neither from Musk on social media nor from Tesla.

The National Highway Traffic Safety Administration (NHTSA) initiated a formal safety investigation into Tesla’s autopilot system in 765,000 U.S. vehicles in August following a series of accidents involving Tesla models and emergency vehicles.

Reporting by Marcelo Teixeira and Hyunjoo Jin; Adaptation by Diane Craft and Lincoln Feast.

Our Standards: The Thomson Reuters Trust Principles.

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