avrdude: stk500_recv(): programmer is not responding

Before I start I know that there are many other topics with this same error but none of them have worked for me yet.

Also my board worked perfectly fine when I uploaded a program to it a few days ago. Now i’m trying to re-upload the program to the board.

I’ve been having a problem uploading to board on my Arduino Uno R3. I have the correct build and port selected on my mac. So I know thats not the problem. I don’t have any pins in the TX or RX ports either. Could having pins in other ports be an issue? My computer recognizes my Arduino board, so why won’t the IDE upload my program to my board?

The error message will be attached.
Thank You

Arduino Error.doc (28.8 KB)