Problem Using Epson JavaPOS ADK 1.11.18.0

Question

I recently bought an Epson TM-T20 printer, and I'm currently trying to create a Java application that will use this. I included the JavaPOS that came with the printer installed and the associated .jar files added to my build path. With all of this in mind, I keep getting this error when I try to run some examples of examples that are packaged with it.

Exception in thread "AWT-EventQueue-0" java.lang.UnsatisfiedLinkError: no jp_co_epson_upos_firm_FirmNativeAccess_1_11_0001 in java.library.path

If the rest of the trace stack helps

in java.lang.ClassLoader.loadLibrary (Unknown source) in java.lang.Runtime.loadLibrary0 (Unknown source) in java.lang.System.loadLibrary (Unknown source) in jp.co.epson.upos.core.v1_11_0001.pntr .CommonPrinterService. (Unknown source) in java.lang.Class.forName0 (own method) in java.lang.Class.forName (Unknown source) in jp.co.epson.uposcommon.creator.EpsonJposServiceInstanceFactory.createInstance (Unknown source) in the jpos file. loader.simple.SimpleServiceConnection.connect (Unknown source) in jpos.BaseJposControl.open (Unknown source) in step 1Frame.processWindowEvent (Step1Frame.java:79) in java.awt.Window.processEvent (Unknown source) in java.awt.pon .dispatchEventImpl (Unknown source) in java.awt.Container.dispatchEventImpl (Unknown source) in java.awt.Window.dispatchEventImpl (Unknown source) in java.awt.Component.dispatchEvent (Unknown source) in java.awt.istue.istueis.pd.patu.eptuepis.istue.ept.istue.ept.isput.istue.istue.istueispatis.patu.Etepis.ist chEventImpl (Unknown source) at java.awt.EventQueue.access $ 200 (Unknown source) at java.awt.EventQueue $ 3.run (Unknown source) at java.awt.EventQueue $ 3.run (Unknown source) in java.security.AccessController .doPrivileged (native method) in java.security.ProtectionDomain $ 1.doIntersectionPrivilege (Unknown source) in java.security.ProtectionDomain $ 1.doIntersectionPrivilege (java.awt.EventQueue $ 4.run (Unknown source) at java. EventQueue $ 4.run (Unknown source) in java.security.AccessController.doPrivileged (native method) in java.security.ProtectionDomain $ 1.doIntersectionPrivilege (Unknown source) at java.awt.EventQueue.dispatchEvent (Unknown source ik) in java.awt.EventDispatchThread.pumpOneEventForFilters (Unknown source) in java.awt.EventDispatchThread.pumpEventsForFilter (Unknown source) in java.awt.EventDispatchThread.pumpEventsForHierarchy (Unknown source in java.awt.EventDispatchThread.pumpEvents (Unknown source) in java.awt.EventDispatchThread.run (Unknown source)

OTHER INFORMATION

• OS: W7 x64
• IDE: Eclipse Juno Service Release 1 x64
• Is the latest JDK installed
• JavaPOS has an application called setupPOS. I also added my printer to this setting.

Any help would be greatly appreciated. thank you

Answer 1

According to java documentation, UnsatisfiedLinkError exception:

It is thrown if the Java virtual machine cannot find a suitable definition in the language of the native language.

According to another question in SO that you can read here , the problem may be in your library path. Try turning on the option.

-Djava.library.path=./XXX 

Where. / XXX will be the relative or full path to where your printer driver can be saved (the directory where jp_co_epson_upos_firm_FirmNativeAccess_1_11_0001.dll or .so is located).

Good luck