I sometime have this error, when I update some of my classes, and after stopping / restarting tomcat. org.apache.jasper.JasperException: Unable to compile class for JSP/datadev/webapps/capimmo/WEB-INF/classes/com/cybericare/cas/capimmo/ProceduresSentences.java:1: The source file encoding may be different with this platform encoding. Please use -encoding option to adjust file encoding, or apply native2ascii utility to make source file ASCII encoding. So For I managed to restart by erasing all previous class and re-build it. but I do no understand what could be the problem. Any advice ? ------------------ System Info : Red Hat Linux release 6.2 (Zoot) Kernel 2.2.14-5.0 on an i686 Mysql Ver 11.12 Distrib 3.23.32 java version "1.3.0" Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0) Java HotSpot(TM) Client VM (build 1.3.0, mixed mode) JDBC Driver : mm.mysql-2.0.4-bin.jar Tomcat 3.2 beta 3