java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path

Question

I am trying to use the 64 bit rxtx serial communication library (downloaded from cloudhopper) with 64bit windows 7 and eclipse. I get the message: java.lang.Unsatisfi

Answer 1

Go to Project -> properties -> Java build path ->Find your .jar. Click on + to open the JAR's properties. Select Native library location and edit it to point to RXTX's shared library (.DLL, .so, .dylib).

Answer 2

You can install librxtx-java package from repo for Ubuntu.

Answer 3

Windows user : my problem was actually that I was placing the rxtxSerial.dll and the rxtxParallel.dll files in the wrong directory.

In my case, they were in [...]/jdk1.7.0_09/bin/ instead of [...]/jre7/bin/, although paths may differ for different versions of Java.

After all it's logic, if we want our JAR to run outside our IDE, we must have the dlls in our java running environment, not in our development environment :)

Answer 4

FIXED:

when using IDE such Netbeans it has it's own directory for the JRE, were you probably installed your RXTX drivers, but when running the JAR file outside your IDE this error occurs... Solution is install the RXTX drivers also inside the JAVA JRE directory which use to run all your JAR files.

Answer 5

I had same problem. I was trying to run built jar file from dist folder and it was not working even it was working from NetBeans IDE. I copied rxtxSerial.dll file in dist folder where my main jar file was and it started working fine.

I was having this error before:

java.lang.UnsatisfiedLinkError: no rxtxSerial in java.library.path thrown while
loading gnu.io.RXTXCommDriver
Exception in thread "Thread-7" java.lang.UnsatisfiedLinkError: no rxtxSerial in
java.library.path
        at java.lang.ClassLoader.loadLibrary(Unknown Source)
        at java.lang.Runtime.loadLibrary0(Unknown Source)
        at java.lang.System.loadLibrary(Unknown Source)
        at gnu.io.CommPortIdentifier.<clinit>(CommPortIdentifier.java:123)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Unknown Source)
        at org.smslib.helper.CommPortIdentifier.<clinit>(CommPortIdentifier.java
:72)
        at org.smslib.modem.SerialModemDriver.connectPort(SerialModemDriver.java
:69)
        at org.smslib.modem.AModemDriver.connect(AModemDriver.java:114)
        at org.smslib.modem.ModemGateway.startGateway(ModemGateway.java:189)
        at org.smslib.Service$1Starter.run(Service.java:277)

Answer 6

I was having the same problem even after installing the RXTXcomm.jar in the Java\jdk\lib directory. Based on the instructions at http://www.jcontrol.org/download/readme_rxtx_en.html I located the rxtxSerial.dll and the rxtxParallel.dll files. Placing them in the bin directory did not help, but placing them in the lib directory along with the RXTXcomm.jar solved the problem.