java.lang.UnsatisfiedLinkError

Processing Electronics (Arduino, etc.)
#1

I am developing a Processing Sketch in Eclipse that uses USB by means of the serial port emulator in jssc.jar. It charts data received over the serial port as lines on a graph. When the program is run, the sketch window opens. But in the Console tab I get these errors:

java.lang.UnsatisfiedLinkError: 'java.lang.String[] jssc.SerialNativeInterface.getSerialPortNames()'
	at jssc.SerialNativeInterface.getSerialPortNames(Native Method)
	at jssc.SerialPortList.getWindowsPortNames(SerialPortList.java:309)
	at jssc.SerialPortList.getPortNames(SerialPortList.java:298)
	at jssc.SerialPortList.getPortNames(SerialPortList.java:182)
	at processing.serial.Serial.list(Unknown Source)
	at SensorsGraph4.SensorsGraph4.setup(SensorsGraph4.java:56)
	at processing.core.PApplet.handleDraw(PApplet.java:2425)
	at processing.awt.PSurfaceAWT$12.callDraw(PSurfaceAWT.java:1547)
	at processing.core.PSurfaceNone$AnimationThread.run(PSurfaceNone.java:313)

What is causing these errors?

The project can be downloaded from:
http://www.mediafire.com/file/0ag0wrntteferqu/SensorsGraph4.zip/file

#2

did you verify that your sketch works error free from the PDE?

so you know already you have a ‘eclipse IDE’ problem?

#3

This sketch was originally developed in the PDE where it works. This problem in Eclipse is happening during my effort to migrate the sketch from PDE to Eclipse. I want to further develop the sketch in Eclipse so I can step through the execution when debugging is needed, and use either Javadoc, or Doxygen, to document it.

1 Like
#4

thanks,
did you try

#5

The procedure in that link is what I had already done, with the exception I imported jssc.jar, and then put it in the path. Were it not in the path I would not have been able to execute the sketch because the serial class would not be available. The errors I opened this thread with are runtime errors.

If you wish to see for yourself the workspace, and the project within it, can be downloaded from:
http://www.mediafire.com/file/0ag0wrntteferqu/SensorsGraph4.zip/file

#6

no, i not use eclipse

but why you not take a look at
processing-3.5.3\modes\java\libraries\serial\

i would assume you just forget to copy something??

or you wait for the eclipse users to jump in here.

#7

Try the following posts:

Kf

#8

Your first suggest link recommends the addition of -d32 option at:
Run => Run Configurations => Java Application => => (x)= Arguments => VM Arguments
When this is done, when I run the sketch, I get message box titled “Java Virtual Machine Launcher” with the error message:

Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

In the console tab I see the error:

Unrecognized option: -d32

I do not know what to do about this. I considered installing 32 Bit Eclipse, but I do not see a 32 Bit option on the Eclipse download page.

Your second suggested link seems relevant only to Linux OS. My OS is Windows 7. I did not find a way to install “gnueabihf” in my Windows 7 OS, and if there is a Windows 7 equivalent, I do not know what it is.

#9

The fatal exception problem is solved. To solve it:
I changed the Java installation to latest: (OpenJDK13U-jdk_x64_windows_hotspot_13.0.1_9.msi) from:

Then I downloaded the latest (version 2.8) JSSC code from:
https://search.maven.org/search?q=jssc
and in the Eclipse project I used it to substitute the JSSC that came with the Processing core.

The exception errors disappeared. But now I have the next problem. There are no serial ports returned by the Serial.list() function, even though I have an Arduino device plugged into an USB port. I would appreciate recommendations on how to troubleshoot this.

Is it possible Serial.list() is not finding USB ports because I am using the OpenJDK?

1 Like
#10

After importing the JSSC 2.8 (the latest) I still had trouble when executing the sketch, in spite of the error indicator no longer being on that line. It turns out that the JSSC version I was using was not the problem. The problem was lack of drivers. This was solved by installing the Arduino IDE to get its USB drivers.