Edit: Rincewind, I feel like a complete dolt right now, but I can't thank you enough for your suggestion.  I was just searching for  "fan" in the search box on the pins.h tab and didn't consider that it was a huge list of all of the boards.  I'm relieved that I didn't wire something wrong!  Thanks!

I just tried it and it worked like it should, which is great.  Unfortunately, my fan is still not working correctly with the "fan" button on repetier.  I was so close too.

Edit:  It seems that the fan is on when I turn my SD3 on, and stays on despite pushing the fan button.

Edit2:  After unplugging and plugging the 12v and ground connection, the fan is no longer on when the machine is, but will still not come on when commanded to.  I've checked the wiring and it is connected as outlined in Ian's blog.

2. Are you using the pre-prepared Arduino 022 linked to in my github?

I've been working on adding a fan to my print head, and I needed to change the fan pin from -1 to 4 in the firmware.  Ian's instructions call for a firmware update in the process (I think that's what it says), so I have taken the steps needed to do so.  I've already changed the necessary value to 4, but cannot seem to upload the new firmware to my board.

I've worked with Uno's in the past, so I'm not too uncomfortable with the Arduino platform.  I'm just stuck at this point on finding a solution, and would really appreciate anyone's help in the matter.

Here is a screenshot of my issue.  After hitting upload, this occurs.  It even occurs when trying to use the Verify command under the Sketch dropdown.  I'm lost!  Thanks in advance for the assistance.