when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: ${resource.customVariables.mapURL} [in template "tempLayers.ftl" at line 30, column 85] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.EvalUtil.coerceModelToTextualCommon(EvalUtil.java:467) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:389) at freemarker.core.EvalUtil.coerceModelToStringOrMarkup(EvalUtil.java:358) at freemarker.core.DollarVariable.calculateInterpolatedStringOrMarkup(DollarVariable.java:100) at freemarker.core.DollarVariable.accept(DollarVariable.java:63) at freemarker.core.Environment.visit(Environment.java:330) at freemarker.core.Environment.visit(Environment.java:336) at freemarker.core.Environment.process(Environment.java:309) at freemarker.template.Template.process(Template.java:384) at org.restlet.ext.freemarker.TemplateRepresentation.write(TemplateRepresentation.java:325) at org.restlet.representation.CharacterRepresentation.write(CharacterRepresentation.java:76) at org.restlet.engine.adapter.ServerCall.writeResponseBody(ServerCall.java:519) at org.restlet.engine.adapter.ServerCall.sendResponse(ServerCall.java:463) at org.restlet.ext.servlet.internal.ServletCall.sendResponse(ServletCall.java:430) at org.restlet.engine.adapter.ServerAdapter.commit(ServerAdapter.java:196) at org.restlet.ext.servlet.ServletAdapter.service(ServletAdapter.java:207) at com.supermap.services.rest.RestServlet$AdapterProxy.service(SourceFile:261) at com.supermap.services.rest.RestServlet.service(SourceFile:75) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at com.supermap.server.host.webapp.handlers.WebAppRequestDispatcher.forward(SourceFile:63) at com.supermap.server.host.webapp.handlers.HandleRequestAndSaveToCacheTask.call(SourceFile:61) at com.supermap.server.host.webapp.handlers.HandleRequestAndSaveToCacheTask.call(SourceFile:26) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at com.supermap.server.host.webapp.handlers.ServiceDispatcherHandler.handleRequestByCacheResponse(SourceFile:551) at com.supermap.server.host.webapp.handlers.ServiceDispatcherHandler.handle(SourceFile:410) at com.supermap.server.host.webapp.handlers.AbstractHandler.process(SourceFile:199) at com.supermap.server.host.webapp.handlers.AbstractHandler.a(SourceFile:225) at com.supermap.server.host.webapp.handlers.AbstractHandler.invokeLowerPriorityHandlers(SourceFile:214) at com.supermap.server.host.webapp.handlers.AbstractHandler.process(SourceFile:201) at com.supermap.server.host.webapp.handlers.BasicHandler.process(SourceFile:337) at com.supermap.server.host.webapp.ApplicationFilter.doFilter(SourceFile:254) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.filters.CorsFilter.handleNonCORS(CorsFilter.java:364) at org.apache.catalina.filters.CorsFilter.doFilter(CorsFilter.java:170) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.filters.HttpHeaderSecurityFilter.doFilter(HttpHeaderSecurityFilter.java:126) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:543) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:609) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:810) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1623) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)