Type Exception Report
Message An exception occurred processing [categoria.jsp] at line [34]
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception
org.apache.jasper.JasperException: An exception occurred processing [categoria.jsp] at line [34] 31: <% 32: String cat = model.Connexio.value(paragrafs.categoria_actual); 33: Pagina p = query.sql_query("select * from categoria(" + cat +")"); 34: int nf = p.n / 3; 35: if (p.n % 3 > 0) nf++; 36: int k=0; 37: for (int i=0; i<nf; i++) { Stacktrace: org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:599) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:488) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328) jakarta.servlet.http.HttpServlet.service(HttpServlet.java:814) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Root Cause
java.lang.NullPointerException org.apache.jsp.categoria_jsp._jspService(categoria_jsp.java:173) org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) jakarta.servlet.http.HttpServlet.service(HttpServlet.java:814) org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:456) org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:380) org.apache.jasper.servlet.JspServlet.service(JspServlet.java:328) jakarta.servlet.http.HttpServlet.service(HttpServlet.java:814) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
Note The full stack trace of the root cause is available in the server logs.