Seeeduino error when uploading

Hey so when i try to upload code to my seeduino it produces the following error :

avrdude: ser_open(): can’t open device “\.\COM4”: The system cannot find the file specified.

Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

It compiles fine but won’t go any further

Have you selected the right serial port?

it is set to the one it is plugged into should work