Toronto Transit Commission CEO Andy Byford had a productive, 90-minute meeting with his Bombardier counterpart on Friday afternoon over issues relating to the doors on the new “Rocket” subway trains that has caused major delays, a TTC spokesman said.

Brad Ross told CityNews that the two discussed a number of issues, doors were one of them, and that Montreal-based Bombardier is committed to a solution.

“They do have a solution for the door problems,” he said. “They have committed to expediting that fix and will have it in place by the end of February.”

The issue has to do with the sensitivity of the system that controls the opening and closing of the doors. If the doors can’t shut properly after three attempts, the entire train – which holds six cars – must be taken out of service while the system reboots.

Ross said Tuesday that something as small as a coffee cup can cause the doors to not close completely, signaling the system to repeat the door open and close function.

He described the door issue as a “teething” problem.

The TTC has received 27 trains from  Bombardier. Eventually, there will be 70 new trains in the fleet.

Bombardier is also building 204 new low-floor streetcars for the transit commission. The streetcars are air-conditioned and have more seating capacity, larger windows and room to accommodate bikes, at a cost of $1 billion.