Dear Sir/Madam I have re-installed Tomcat and jdk on my Linux Redhat 9 server. Now 8080 port is not running and following error is occuring when i stop tomcat. Exception in thread "main" java.lang.NoClassDefFoundError: Xmx512M [root@library root]# /opt/tomcat/bin/startup.sh Using CATALINA_BASE: /opt/tomcat Using CATALINA_HOME: /opt/tomcat Using CATALINA_TMPDIR: /opt/tomcat/temp Using JRE_HOME: /usr/local/jdk [root@library root]#/opt/tomcat/bin/shutdown.sh Using CATALINA_BASE: /opt/tomcat Using CATALINA_HOME: /opt/tomcat Using CATALINA_TMPDIR: /opt/tomcat/temp Using JRE_HOME: /usr/local/jdk Exception in thread "main" java.lang.NoClassDefFoundError: Xmx512M [root@library root]# Please help me in solving this error. With Regards Indu Bhushan Tamrakar Library, RRCAT, Indore MP -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.