Exception: Getting keyword names from library 'Remote' failed: Calling dynamic method 'get_keyword_names' failed:

[SibaPNayak]

I am performing API testing of my Library by running the library as remote server and robot testcases. When I am using two instances of eclipse for the operation, everything works as expected. I am able to run the testcases.

But I am facing issue when I am creating a jar and run the remote server in cmd prompt. In eclipse the error I could see as

StackTrace:

C:\Work\Eclipse\platform_workspace\TestRobotPlatformruntime\Jar>java -cp "%CLASSPATH%;PlatformRuntimeRemoteServer.jar" remoteApiServer myPlatformApiRobot obj is created 0 [main] INFO org.robotframework.remoteserver.RemoteServer - Mapped path /PlatformRuntime to library PlatformApiRobot. 1 [main] INFO org.robotframework.remoteserver.RemoteServer - Robot Framework remote server starting 2 [main] INFO org.eclipse.jetty.server.Server - jetty-7.x.y-SNAPSHOT 50 [main] INFO org.eclipse.jetty.server.handler.ContextHandler - started o.e.j.s.ServletContextHandler{/,null} 1844 [main] INFO org.eclipse.jetty.server.AbstractConnector - Started SelectChannelConnector@0.0.0.0:1234 1845 [main] INFO org.robotframework.remoteserver.RemoteServer - Robot Framework remote server started on port 1234. 15836 [qtp2066940133-13] WARN org.robotframework.remoteserver.servlet.ServerMethods - java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:58) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:115) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.execute(ReflectiveXmlRpcHandler.java:106) at org.apache.xmlrpc.server.XmlRpcServerWorker.execute(XmlRpcServerWorker.java:46) at org.apache.xmlrpc.server.XmlRpcServer.execute(XmlRpcServer.java:86) at org.apache.xmlrpc.server.XmlRpcStreamServer.execute(XmlRpcStreamServer.java:200) at org.apache.xmlrpc.webserver.XmlRpcServletServer.execute(XmlRpcServletServer.java:112) at org.apache.xmlrpc.webserver.XmlRpcServlet.doPost(XmlRpcServlet.java:196) at org.robotframework.remoteserver.servlet.RemoteServerServlet.doPost(RemoteServerServlet.java:122) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at org.robotframework.remoteserver.servlet.RemoteServerServlet.service(RemoteServerServlet.java:102) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:565) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:348) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:452) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:894) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:948) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:851) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538) at java.lang.Thread.run(Unknown Source) 15848 [qtp2066940133-13] ERROR org.apache.xmlrpc.server.XmlRpcErrorLogger - Failed to invoke method get_keyword_names in class org.robotframework.remoteserver.servlet.ServerMethods: java.lang.RuntimeException: No keywords found in the test library org.apache.xmlrpc.common.XmlRpcInvocationException: Failed to invoke method get_keyword_names in class org.robotframework.remoteserver.servlet.ServerMethods: java.lang.RuntimeException: No keywords found in the test library at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:129) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.execute(ReflectiveXmlRpcHandler.java:106) at org.apache.xmlrpc.server.XmlRpcServerWorker.execute(XmlRpcServerWorker.java:46) at org.apache.xmlrpc.server.XmlRpcServer.execute(XmlRpcServer.java:86) at org.apache.xmlrpc.server.XmlRpcStreamServer.execute(XmlRpcStreamServer.java:200) at org.apache.xmlrpc.webserver.XmlRpcServletServer.execute(XmlRpcServletServer.java:112) at org.apache.xmlrpc.webserver.XmlRpcServlet.doPost(XmlRpcServlet.java:196) at org.robotframework.remoteserver.servlet.RemoteServerServlet.doPost(RemoteServerServlet.java:122) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at org.robotframework.remoteserver.servlet.RemoteServerServlet.service(RemoteServerServlet.java:102) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:565) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:348) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:452) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:894) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:948) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:851) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.RuntimeException: java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:64) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:115) ... 29 more Caused by: java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:58) ... 34 more Caused by: java.lang.RuntimeException: java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:64) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:115) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.execute(ReflectiveXmlRpcHandler.java:106) at org.apache.xmlrpc.server.XmlRpcServerWorker.execute(XmlRpcServerWorker.java:46) at org.apache.xmlrpc.server.XmlRpcServer.execute(XmlRpcServer.java:86) at org.apache.xmlrpc.server.XmlRpcStreamServer.execute(XmlRpcStreamServer.java:200) at org.apache.xmlrpc.webserver.XmlRpcServletServer.execute(XmlRpcServletServer.java:112) at org.apache.xmlrpc.webserver.XmlRpcServlet.doPost(XmlRpcServlet.java:196) at org.robotframework.remoteserver.servlet.RemoteServerServlet.doPost(RemoteServerServlet.java:122) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at org.robotframework.remoteserver.servlet.RemoteServerServlet.service(RemoteServerServlet.java:102) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:565) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:348) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:452) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:894) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:948) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:851) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:58) ... 34 more 16885 [qtp2066940133-11] WARN org.robotframework.remoteserver.servlet.ServerMethods - java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:58) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:115) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.execute(ReflectiveXmlRpcHandler.java:106) at org.apache.xmlrpc.server.XmlRpcServerWorker.execute(XmlRpcServerWorker.java:46) at org.apache.xmlrpc.server.XmlRpcServer.execute(XmlRpcServer.java:86) at org.apache.xmlrpc.server.XmlRpcStreamServer.execute(XmlRpcStreamServer.java:200) at org.apache.xmlrpc.webserver.XmlRpcServletServer.execute(XmlRpcServletServer.java:112) at org.apache.xmlrpc.webserver.XmlRpcServlet.doPost(XmlRpcServlet.java:196) at org.robotframework.remoteserver.servlet.RemoteServerServlet.doPost(RemoteServerServlet.java:122) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at org.robotframework.remoteserver.servlet.RemoteServerServlet.service(RemoteServerServlet.java:102) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:565) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:348) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:452) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:894) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:948) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:851) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538) at java.lang.Thread.run(Unknown Source) 16890 [qtp2066940133-11] ERROR org.apache.xmlrpc.server.XmlRpcErrorLogger - Failed to invoke method get_keyword_names in class org.robotframework.remoteserver.servlet.ServerMethods: java.lang.RuntimeException: No keywords found in the test library org.apache.xmlrpc.common.XmlRpcInvocationException: Failed to invoke method get_keyword_names in class org.robotframework.remoteserver.servlet.ServerMethods: java.lang.RuntimeException: No keywords found in the test library at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:129) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.execute(ReflectiveXmlRpcHandler.java:106) at org.apache.xmlrpc.server.XmlRpcServerWorker.execute(XmlRpcServerWorker.java:46) at org.apache.xmlrpc.server.XmlRpcServer.execute(XmlRpcServer.java:86) at org.apache.xmlrpc.server.XmlRpcStreamServer.execute(XmlRpcStreamServer.java:200) at org.apache.xmlrpc.webserver.XmlRpcServletServer.execute(XmlRpcServletServer.java:112) at org.apache.xmlrpc.webserver.XmlRpcServlet.doPost(XmlRpcServlet.java:196) at org.robotframework.remoteserver.servlet.RemoteServerServlet.doPost(RemoteServerServlet.java:122) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at org.robotframework.remoteserver.servlet.RemoteServerServlet.service(RemoteServerServlet.java:102) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:565) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:348) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:452) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:894) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:948) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:851) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.RuntimeException: java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:64) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:115) ... 29 more Caused by: java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:58) ... 34 more Caused by: java.lang.RuntimeException: java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:64) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.invoke(ReflectiveXmlRpcHandler.java:115) at org.apache.xmlrpc.server.ReflectiveXmlRpcHandler.execute(ReflectiveXmlRpcHandler.java:106) at org.apache.xmlrpc.server.XmlRpcServerWorker.execute(XmlRpcServerWorker.java:46) at org.apache.xmlrpc.server.XmlRpcServer.execute(XmlRpcServer.java:86) at org.apache.xmlrpc.server.XmlRpcStreamServer.execute(XmlRpcStreamServer.java:200) at org.apache.xmlrpc.webserver.XmlRpcServletServer.execute(XmlRpcServletServer.java:112) at org.apache.xmlrpc.webserver.XmlRpcServlet.doPost(XmlRpcServlet.java:196) at org.robotframework.remoteserver.servlet.RemoteServerServlet.doPost(RemoteServerServlet.java:122) at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) at org.robotframework.remoteserver.servlet.RemoteServerServlet.service(RemoteServerServlet.java:102) at javax.servlet.http.HttpServlet.service(HttpServlet.java:820) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:565) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:479) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1031) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:406) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:965) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111) at org.eclipse.jetty.server.Server.handle(Server.java:348) at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:452) at org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:894) at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:948) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:851) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:606) at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.RuntimeException: No keywords found in the test library at org.robotframework.remoteserver.servlet.ServerMethods.get_keyword_names(ServerMethods.java:58) ... 34 more

Could anyone please help.. Let me know if any other information is needed.

[michalanglart]

Hi,

You're trying to start your remote library from command line and it crashes, where is RED here involved? It looks like a question to https://github.com/robotframework/jrobotremoteserver

If it works from eclipse and does not work from command line I would look carefully for your CLASSPATH as maybe this is a problem. Also make sure you have your classes inside the jar file.