Error inside Serial.() when I change to Size(x,y) to P3D

I have a sketch that uses serial communication to get data from an arduino.

It also displays a circle on the screen as part of a calibration routine.

It works fine, but I decided it would look a little cooler to make the circle (ellipse) into a sphere

so I tried simply changing

 

size(currentWindowX, currentWindowY);

 

to

size(currentWindowX, currentWindowY,P3D);

 

so that I can use the sphere command

 

 

but just adding P3D to my size(x,y) line gave me the following error.  If I get rid of the P3D it immediately works fine again????  Is there an issue with serial in P3D mode????

 

 

Error inside Serial.<init>()

 

Here is the error log:

Stable Library
=========================================
Native lib Version = RXTX-2.1-7
Java lib Version   = RXTX-2.1-7
[0] "COM6"
[1] "COM10"
  Connecting to -> COM6
[0] "COM6"
[1] "COM10"
  Connecting to -> COM6
gnu.io.PortInUseException: Unknown Application
 at gnu.io.CommPortIdentifier.open(CommPortIdentifier.java:354)
 at processing.serial.Serial.<init>(Unknown Source)
 at processing.serial.Serial.<init>(Unknown Source)
 at ProcessingALIRELATIVEBETA3.setup(ProcessingALIRELATIVEBETA3.java:126)
 at processing.core.PApplet.handleDraw(PApplet.java:2117)
 at processing.opengl.PGL$PGLListener.display(PGL.java:2472)
 at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:548)
 at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:533)
 at jogamp.opengl.GLAutoDrawableBase$2.run(GLAutoDrawableBase.java:280)
 at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:904)
 at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:822)
 at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:543)
 at processing.opengl.PGL.requestDraw(PGL.java:814)
 at processing.opengl.PGraphicsOpenGL.requestDraw(PGraphicsOpenGL.java:1566)
 at processing.core.PApplet.run(PApplet.java:2020)
 at java.lang.Thread.run(Thread.java:662)
java.lang.NullPointerException
 at processing.mode.java.runner.Runner.findException(Runner.java:707)
 at processing.mode.java.runner.Runner.reportException(Runner.java:652)
 at processing.mode.java.runner.Runner.exception(Runner.java:595)
 at processing.mode.java.runner.EventThread.exceptionEvent(EventThread.java:367)
 at processing.mode.java.runner.EventThread.handleEvent(EventThread.java:255)
 at processing.mode.java.runner.EventThread.run(EventThread.java:89)
Exception in thread "Animation Thread" java.lang.RuntimeException: Error inside Serial.<init>()
 at processing.serial.Serial.errorMessage(Unknown Source)
 at processing.serial.Serial.<init>(Unknown Source)
 at processing.serial.Serial.<init>(Unknown Source)
 at ProcessingALIRELATIVEBETA3.setup(ProcessingALIRELATIVEBETA3.java:126)
 at processing.core.PApplet.handleDraw(PApplet.java:2117)
 at processing.opengl.PGL$PGLListener.display(PGL.java:2472)
 at jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:548)
 at jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:533)
 at jogamp.opengl.GLAutoDrawableBase$2.run(GLAutoDrawableBase.java:280)
 at jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:904)
 at jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:822)
 at com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:543)
 at processing.opengl.PGL.requestDraw(PGL.java:814)
 at processing.opengl.PGraphicsOpenGL.requestDraw(PGraphicsOpenGL.java:1566)
 at processing.core.PApplet.run(PApplet.java:2020)
 at java.lang.Thread.run(Thread.java:662)