Code problems

[Justin Buist]

Originally Posted by EmileH

It looks like where you are setting an inverted motor (line 706 of your robot drive class), you are referencing a motor or some object that doesn't exist. NullPointerExceptions are errors that get thrown when you are trying to call something but it returns null.

RobotDrive is part of WPILibJ so it isn't "their" class. Line 706 in that class references the front right motor. In the posted code from Robot.java line 61 references the rear left motor so there might be a discrepancy between what was posted and what was actually run.

Either way the problem is in this line:

DriveTrain41 = new RobotDrive(0,1,2,3);

One of those pins doesn't actually map to a Talon. That could be a programming or wiring error.