Vancsik is chasing his first European Tour victory
SECOND ROUND LEADERBOARD:-10 D Vancsik (Arg)-9 C Cevaer (Fra)-8 L Santiago (Spa)-7 D Frost (SA)-6 N Begay (US), A Noren (Swe), M Vibe-Hastrup (Den)
Daniel Vancsik leads Christian Cevaer by one shot at the halfway stage of the Madeira Island Open.
The Argentine, who did not manage one top-10 finish in his first full season on the circuit last year, reached 10 under par by hitting a 66.
France's Cevaer was heading for a 64 until closing with a bogey five.
First-round leader Ricardo Santos fell back into the pack, while ex-Ryder Cup star Peter Baker could add only a 72 to his first-day 67.
In third place on eight under after a 67 is 44-year-old Spaniard Santiago Luna, playing the 520th event of his Tour career and his first of this year.
Experienced South African David Frost, like Baker playing on a sponsor's invitation, shot 65 and is just three back.
One further adrift is American Notah Begay, who came through Europe's qualifying school in November after losing his card in the States.
Former Open champion Paul Lawrie missed the cut on four over, but defending champion Jean Van de Velde improved eight shots on his opening 75 to make it through.

Hume followed his 65 on Thursday with a 69 on Friday
R2 LEADERBOARD:GB & Ire unless stated-11 J Randhawa (Ind) -10 B Hume -9 I Steel (Mas), G Lockerbie -8 P Lawrie, WC Liang (Chi)-7 M Fraser (Aus)
Scotland's Barry Hume is just one shot off the lead at the Singapore Masters after shooting a second-round 69 at the Laguna Country Club on Friday.
But Ryder Cup stars David Howell, Darren Clarke and Lee Westwood all failed to make the cut.
Hume is at 10 under, with India's Jyoti Randhawa clear at the top of the leaderboard after battling to a round of 68 in difficult conditions.
Howell said: "I just haven't got going - I've lost the plot at the moment."
Clarke, who has won 11 European titles but none since 2003, slumped to a three-over-par 147 to miss the cut by five shots.
He said: "If I knew what I was doing wrong, I would have put it right."
The 31-year-old Howell, who won three times last season, has had a poor start to his year.
He said: "I'm playing terribly at the moment and it is very frustrating.
"No excuses, I'm just playing badly. I'm just not hitting the ball straight. The short game is great but the long game isn't.
"I always look forward to the Masters but I want to be going in with better form than this."
Glaswegian Hume, 25, shot a second successive 65 but would have done even better had he avoided a double bogey at the par-three 17th.
"It is always disappointing to double bogey the 17th but my golf overall has been good so I am not too worried about that," said the Scot, who has played on the Asian Tour for the past two years.
"The goal was to make the cut. There are a lot of players here who are going to miss out so I am happy with that but I have probably done better so far than I thought I would."

Montgomerie backs plans for radical rule changesColin Montgomerie has backed plans to change regulations for golf clubs that will make it harder for players to get out of the rough.
The Royal and Ancient's proposals aim to make driving accuracy more important in golf.
Montgomerie told Five Live it is time tournaments were not decided by the quality of the players' equipment.
"You have difficult shots that are easier to pull off. Anything that makes it tougher are a plus for the game."

The Scot added: "Now with extra technology and people hitting the ball an awful long way we've found that, statistically, accuracy doesn't matter the same as length.
"This is what they're obviously trying to get back to.
"They want the benefit of the shot to be how accurate it is rather than how far it actually goes. All credit to them for acknowledging that statistic. Let's hope it works."
However, the sport's record Major winner Jack Nicklaus is not convinced the plans go far enough.
The 67 year old believes the distance the ball travels is the sport's problem.
"If you change the ball you could bring about 17,000 golf courses, that are basically obsolete to the professional, back into play for a possible event," he said.