https://answers.axonivy.com/questions/2054/have-jstl-error<p>I am using ivy both 6.0 and 6.2, and I have a lot of error trace java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config I think it's because of missing jstl jar file in ivy engine. Is there any solution for that?</p>enWed, 28 Sep 2016 08:38:10 -0400https://answers.axonivy.com/questions/2054/have-jstl-error#2056<p>Error page is not the problem. I didn't have it in my project</p>hungnamWed, 28 Sep 2016 08:38:10 -0400https://answers.axonivy.com/questions/2054/have-jstl-error#2056https://answers.axonivy.com/questions/2054/have-jstl-error/2055<p>This error could arise if your webapp defines an error page which does not exist. If the configured error page can not be resolved, the webserver tries to display some legacy jsp error page which can fail with this error. Did you forget to migrate the content of the webapps directory? See <a href="http://developer.axonivy.com/doc/latest/EngineGuideHtml/configuration.html#configuration-errorhandling-customized">http://developer.axonivy.com/doc/latest/EngineGuideHtml/configuration.html#configuration-errorhandling-customized</a></p> <p>Furthermore we've changed that JSTL is in the web-inf/lib dir. But that should not affect you: <a href="http://developer.axonivy.com/doc/latest/doc/migrationNotes/MigrationNotesEngine.html#taglib">http://developer.axonivy.com/doc/latest/doc/migrationNotes/MigrationNotesEngine.html#taglib</a></p> <p>If these hints do not help you. Analyze the log output of the engine - may be this is only a follow up problem which obfuscates the root cause.</p>Reguel WermelingerTue, 27 Sep 2016 16:43:46 -0400https://answers.axonivy.com/questions/2054/have-jstl-error/2055