CANNOT DEPLOY CODE
 

Hello - I am the head programmer from the LF robotics team. I am trying to deploy some code that did work about a week ago - I added in some motors and was attempting to deploy the code again - no errors came up - I went to the driver station and everything was green and good-to-go - I enabled teleop and nothing happened - IP's are good - subnet mask is correct for deploying and running code - firewall is disabled - netbeans team number is set - the image is good on the cRIO - I checked everything I could think of and the problem still occurs.

Does anyone happen to know what I could do to fix this issue?

THANKS!

Re: CANNOT DEPLOY CODE
 

Are there any messages on the Diagnostic tab of the Driver Station?

What is the Robot Signal Light doing? Describe its pattern of blinks.

Does the Dashboard show you what the joysticks are doing? Does it show what is being commanded to the drive motors?

Go back to the previous working program if possible, just to make sure it still works. That will help rule out a hardware problem and let you know to focus on your code changes.

Re: CANNOT DEPLOY CODE
 

When the robot is first turned on(not connected to anything) it is a fast blink(200ms 200ms). When the driver station is initiated the blinking is correct for disabled, teleop, and autonoous.

When I try to deploy the old code it does the same thing.

Here is the deployment stuff for the new code:

For the old code:

There is stuff in the diagnostics tab.

It does not show anything for the joysticks or drive motors.

I think it is the driver station.

ALSO - the lights on both the Jaguar and VEX speed controllers are all weird. On both - nomatter what I do - one always shows that it is in FULL FORWARD and one always shows that it has been SUCCESSFULLY CALIBRATED. I have no idea if that means anything - thought I would just put it out there.

THANKS!

Re: CANNOT DEPLOY CODE
 

Hi LFRobotics,
The key here is the java.lang.NullPointerException that the program prints out in your new code. What the NullPointerException means is that you're using a variable that hasn't been initialized yet or if you're trying to get something that doesn't exist. In this case, a button seems to be the issue. Looking back through the stack trace of the error, it seems to occur at edu.wpi.first.LFRobot2014.OI.<init>(OI.java:64). I would look through your OI file and check line 64. That is the line where it runs into an error. You'll notice that the NullPointerException segment of the output doesn't occur in your "Old code" as well so something that was changed on that line isn't quite working properly.

I can't speak directly to what the issue is since I've only used Joystick.getRawButton() rather than Button.whenPressed(), but I think it's likely that your Button hasn't been initialized properly.

Ian

Re: CANNOT DEPLOY CODE
 

I checked the code over and everything looks fine. What else could it be?

THANKS!

Re: CANNOT DEPLOY CODE
 

It's not fine, since it's clearly throwing exceptions. This is the relevant part of the stack trace:
So look in LFRobot.java at line 38. There will be a reference to some variable. A null pointer exception is most often thrown when you try to access an object that you haven't instantiated yet (it'll throw an error because you're trying to act on null, or nothing). Make sure your variables are created properly.

Also, what does the stuff in the Diagnostics tab say? It often provides very useful debugging info

Re: CANNOT DEPLOY CODE
 

Line 38 is a comment put in the code as default - underneath the comment is

Both were put in as default. I will hopefully be able to get the stuff in the diagnostics tab tomorrow - we did not have school today due to cold weather.

THANKS!

Re: CANNOT DEPLOY CODE
 

Then keep going up the stack trace. See how the next item is in CommandBase.java line 30. Then after that, OI.java line 64 (I stand corrected, Ian above me got the right file first).

But anyway, the stack trace you see tells you where the exception occurred and the chain of current method calls. Read some more about them. So in your example, the exception was encountered in JoystickButton.java line 36 (the top element in the trace), which was being called from Trigger.java line 45, which was called from the same file, line 59, etc. You follow the trace down until you find the first one of your files (in this case, OI.java) and check the line given.

Re: CANNOT DEPLOY CODE
 

Okay - so I looked through all of my code and could not find anything wrong with it. But I know that something is wrong with it sooo......

Could you perhaps look over it for me and maybe you might be able to see the error?

Here is a link to it(I am currently using dropbox because I have not yet set Git up):

https://www.dropbox.com/sh/iu4zl3b3lsagh66/yIxw3dubVt

Here is a link to the most recent deploy output:

https://www.dropbox.com/s/ricf3rarrw...ployOutput.txt

THANKS SOOOOOO MUCH!

Re: CANNOT DEPLOY CODE
 

From OI:

You are using rightStick and leftStick before you are creating the objects.

Re: CANNOT DEPLOY CODE
 

Okay - that fixed it - THANKS!