What is this meant by??
An exe is a file extension for an executable file on a windows PC.
@levh92
Are you saying that you can use the Processing language successfully?
You can run Processing apps with a double click you know if you save it as a java app.
Do you then get nothing when you try these other applications?
Are you sure you have set up the serial port correctly in these other applications?
If you have checked these then we need to see the code that is running on the Arduino. If it is long or complex then a cut down version to see the problem is best. Then we need to know exactly what application you are trying.