McLaren missed the first test day of the 2014 Formula 1 season as electrical problems with the new MP4-29 kept it in the Jerez garages on Tuesday.
Jenson Button had been scheduled to give the Mercedes-powered car, which was launched last Friday, its first run.
Like several other teams, McLaren was in a race against time to hit the track, but despite its best efforts to get out before the end of the day, it was unable to be ready before the chequered flag came out.
"Today was a challenging start to the MP4-29's test and development programme," said a McLaren statement.
"Along with other teams, we faced difficulties readying our new car for the first winter test of 2014.
"Despite firing up successfully at the MTC last week, the car was predominantly affected by electrical issues during the day.
"The subsequent dismantling, inspection and re-installation of several major components ultimately meant we were unable to conduct any running today."
McLaren MP4-29 technical analysis
The team is confident that it will be able to begin testing on Wednesday.
"We're re-installing key systems on the car overnight, with the expectation that Jenson will begin the car's installation programme tomorrow," its statement added.
Eight of the 11 F1 teams made their public track debuts at Jerez on Tuesday, with Mercedes, Red Bull, Ferrari, Sauber, Force India, Toro Rosso, Williams and Caterham all running.
Marussia's final preparations were delayed and the team is still on its way to the track. It is expected to start running on Thursday.
Lotus will not join the field until the second test in Bahrain next month.
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