Hi, I had developed a dll file with VC++ for read data of parallel port
(JNI).

I had developed a JSP with a JavaBean and I need to call the native method
in my bean but I obtain the followin error

Error: 500
Localizacion: /examples/tesis/database/demo.jsp
Error interno del servlet:

javax.servlet.ServletException: try to access class
tesis.database.ParallelPort from class tesis.database.DatabaseManage
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:399)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
        at org.apache.tomcat.core.Handler.service(Handler.java:286)
        at
org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
        at
org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:79
7)
        at
org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
        at
org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection
(Ajp12ConnectionHandler.java:166)
        at
org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
        at
org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
        at java.lang.Thread.run(Thread.java:484)

Causa Raiz:
java.lang.IllegalAccessError: try to access class
tesis.database.ParallelPort from class tesis.database.DatabaseManage
        at tesis.database.DatabaseManage.read(DatabaseManage.java:166)
        at
tesis.database._0002ftesis_0002fdatabase_0002fdemo_0002ejspdemo_jsp_66._jspS
ervice(_0002ftesis_0002fdatabase_0002fdemo_0002ejspdemo_jsp_66.java:90)
        at
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.ja
va:177)
        at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:318)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:391)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at
org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
        at org.apache.tomcat.core.Handler.service(Handler.java:286)
        at
org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
        at
org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:79
7)
        at
org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
        at
org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection
(Ajp12ConnectionHandler.java:166)
        at
org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
        at
org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
        at java.lang.Thread.run(Thread.java:484)


May you said me which is the problem, what can I do?.

I am using Jdk 1.3, Apache Web Server and Tomcat

Thanks for your help
Regards

Freddy Ramiro Tello Delgado
Sistemas de Información
CIAT.

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