The Reds are frustrated this afternoon - it's spoils shared with AFC Wimbledon going home with a point.
Despite Reds gaffer Daniel Stendel reverting back to his preferred - so far - starting XI that had served the club well in the opening two league fixtures, they couldn't break down a resolute Dons outfit who fought and scrapped for 95 minutes, earning themselves a deserved point.
The Reds actually came out of the blocks well in customary fashion, with Mamadou Thiam hooking over an effort first time from a Dimitri Cavare cross, on the edge of the Dons box.
Soon after, Brad Potts screwed an effort well wide when he found himself well placed inside the box on the end of another great low cross by Cavare.
On 10 minutes, possibly the only real save of note throughout the entire match, as Tom Soares let fly for the visitors from all of 25 yards, but Reds stopper Adam Davies was down sharply to his right to turn the effort behind the post for a corner kick.
The game became very scrappy until the last five minutes of the first half before Tom Bradshaw found himself through into the box, there was a coming together with Dons 'skipper Dejo Oshilaja and the referee gave the away side the free kick.
Best chance of the half for the Reds came in stoppage time when Alex Mowatt ran onto Thiam's through pass, he jinked into the box and curled an effort inches wide of goal.
HALF TIME: Barnsley 0-0 Wimbledon
Within five minutes of the restart, Potts again had a good opportunity inside the box but he crashed his effort wide when in a fantastic position following Kieffer Moore's cross.
Just after the hour mark and a flowing Reds move where Alex Mowatt linked well with Cavare and the cross fell perfectly towards the onrushing Bradshaw but Oshilaja put in a terrific sliding block. Liam Lindsay's header from the resultant corner kick was easily claimed by Tom King.
The introductions of George Moncur, Jordan Williams and Victor Adeboyejo added new impetus for Stendel's side but the visitors won headers, tackles and generally defended superbly to thwart any opportunities.
A frustrating afternoon then, but another point on the board and a third consecutive clean sheet as the Reds now face two away days, back-to-back.
FULL TIME: Barnsley 0-0 Wimbledon
Davies, Cavare, Pinnock, Lindsay, Pinillos, Potts (J.Williams), Mowatt, Dougall, Thiam (Adeboyejo), Moore, Bradshaw (Moncur).