Issue uploading to board - port busy error

Hello,

I have an issue with my nano 33 IOT, i can upload to the board and monitor serial when i first plug the board into my pc but after this first time i can no longer upload to the board as i get the following error:

processing.app.debug.RunnerException
at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:152)
at cc.arduino.UploaderUtils.upload(UploaderUtils.java:77)
at processing.app.SketchController.upload(SketchController.java:732)
at processing.app.SketchController.exportApplet(SketchController.java:703)
at processing.app.Editor$UploadHandler.run(Editor.java:2071)
at java.lang.Thread.run(Thread.java:748)
Caused by: processing.app.SerialException: Error touching serial port 'COM9'.
at processing.app.Serial.touchForCDCReset(Serial.java:107)
at cc.arduino.packages.uploaders.SerialUploader.uploadUsingPreferences(SerialUploader.java:136)
... 5 more
Caused by: jssc.SerialPortException: Port name - COM9; Method name - openPort(); Exception type - Port busy.
at jssc.SerialPort.openPort(SerialPort.java:164)
at processing.app.Serial.touchForCDCReset(Serial.java:101)
... 6 more

The only way i am able to upload to the board again is if i restart my pc. I have tried on another pc and i dont have this issue, i am able to upload to the board as much as i like.

Any help would be appreciated!

Just an update: I managed to fix this issue with a little googling i found this article:

i had exactly the same issue.

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