MPIDE cannot connect to Com Port 21

[Noah Weller]

I am unable to upload projects to my chipkit pro MX4 board using MPIDE. My code compiles, I have the correct board selected and comport. However when I try to upload my project to the board I get an error saying that it cannot connect to the comport and to shut down applications that are using it. Has anyone set up MPIDE and used the chipkit pro MX4 board?

[jpeyron]

Hi Noah,

I would make sure that you are able to see the ChipKit pro MX4 in the device manager. If you are then make sure that you have the most up to date driver. Also make sure that you have the boot loader installed for arduino and mpide described here. 

cheers,

Jon