XProc fails in 0.9.2 demo app

[timathom]

Hello, I'm trying out Servlex (looks promising!) and just installed the latest release (0.9.2) using the GUI installer. When I deploy the demo hello-world app, everything works except for the XProc example. It fails and returns a 500 error (see stack trace below). However, when I revert to Servlex 0.9.1, the XProc example executes successfully.

oct 23, 2015 11:27:33 AM org.apache.catalina.core.StandardWrapperValve invoke
GRAVE: El Servlet.service() para el servlet [Servlex] en el contexto con ruta [] lanzó la excepción [La ejecución del Servlet lanzó una excepción] con causa raíz
java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java)
        at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java)
        at com.xmlcalabash.util.AxisNodes.<init>(Unknown Source)
        at com.xmlcalabash.util.S9apiUtils.getDocumentElement(Unknown Source)
        at com.xmlcalabash.core.XProcConfiguration.parse(Unknown Source)
        at com.xmlcalabash.core.XProcConfiguration.loadConfiguration(Unknown Source)
        at com.xmlcalabash.core.XProcConfiguration.<init>(Unknown Source)
        at org.expath.servlex.processors.saxon.CalabashPipeline.getRuntime(CalabashPipeline.java:155)
        at org.expath.servlex.processors.saxon.CalabashPipeline.compile(CalabashPipeline.java:119)
        at org.expath.servlex.processors.saxon.CalabashPipeline.compile(CalabashPipeline.java:102)
        at org.expath.servlex.processors.saxon.components.CalabashXProcPipeline.run(CalabashXProcPipeline.java:101)
        at org.expath.servlex.runtime.ServletInvocation.invoke(ServletInvocation.java:50)
        at org.expath.servlex.Servlex.invoke(Servlex.java:309)
        at org.expath.servlex.Servlex.service(Servlex.java:248)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)