I was getting a similar error to Daniel when I lost connection to the cRIO during deployment.
Deploying Sensor Fusion Robot Project.lvproj
Deploying RT CompactRIO Target (successfully deployed target settings)
Deploying Accumulator.lvlib
Deploying MotorControl.lvlib
Deploying Camera.lvlib
Deploying NI_FPGA_Interface.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA SPI.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA Interrupt.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA Global.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA Encoder.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA DMA.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA System.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA Counter.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA CounterEncoderSourceConvertion.lvlib
Deploying PWM.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA Watchdog.lvlib
Deploying AnalogTrigger.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA DIO.lvlib
Deploying DigitalModule.lvlib
Deploying DigitalOutput.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA AI.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA Solenoid.lvlib
Deploying AnalogChannel.lvlib
Deploying Joystick.lvlib
Deploying Ultrasonic.lvlib
Deploying VariantType.lvlib
Deploying DigitalInputFilter.lvlib
Deploying DriverStation.lvlib
Deploying NI_FPGA_Interface.lvlib:NIFPGA AnalogTrigger.lvlib
Deploying AnalogModule.lvlib
Deploying DigitalInput.lvlib
Deploying Servo.lvlib
Deploying Gyro.lvlib
Deploying Counter.lvlib
Deploying Watchdog.lvlib
Deploying RobotDrive.lvlib
Deploying FRC Robot Boot-up Deployment (failed to deploy)
Download completed with errors.
I suspected this was because the power on my battery was low. When I connected a power supply to my cRIO I was able to deploy successfully.
Deploying Sensor Fusion Robot Project.lvproj
Deploying Acquire Image.vi
Deploying Async VI Agent.vi
Deploying Autonomous Independent.vi
Deploying Robot Main.vi
Deploying Send Images To PC.vi
Deploying RT CompactRIO Target (successfully deployed target settings)
Is this a possible cause for you issue?