Former Scotland striker Garry O'Connor made his debut for Morton as the bottom club in the Championship drew 0-0 with Raith Rovers at Cappielow.
At the other end of the table, Mark Burchill scored the only goal as Livingston moved to within two points of the play-offs with a 1-0 win at leaders Dundee.
That result allowed Hamilton Accies to cut the gap at the top to a single point with a 0-0 draw at third-placed Falkirk.
Dumbarton won 4-2 away to Cowdenbeath thanks to a Mitch Megginson double and goals from Colin Nish and on-loan St Johnstone striker Chris Kane. Kyle Miller and Jamie Stevenson netted for the Blue Brazil.
Queen of the South defeated Alloa 3-1 at Palmerston with goals from Michael Paton, Gavin Reilly and Derek Lyle. On-loan Hibs striker Ross Caldwell scored on his debut for the Wasps.
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