An error has occurred : java.lang.ArrayIndexOutOfBoundsException: Index -262 out of bounds for length 640 Fr The boy is important. He has to live. Mo Tu We Th Fr Sa Su Mo Tu We Th 13 14 15 16 17 18 19 20 21 22 23 24 25 26 PlantUML (1.2026.7beta1) has crashed. Diagram size: 9 lines / 347 characters. Java Runtime: OpenJDK Runtime Environment JVM: OpenJDK 64-Bit Server VM Default Encoding: UTF-8 Language: en Country: US PLANTUML_LIMIT_SIZE: 4096 You should send this diagram and this image to plantuml@gmail.com or post to https://plantuml.com/qa to solve this issue. You can try to turn around this issue by simplifing your diagram. java.lang.ArrayIndexOutOfBoundsException: Index -262 out of bounds for length 640 net.sourceforge.plantuml.asciiart.BasicCharAreaImpl.drawChar(BasicCharAreaImpl.java:74) net.sourceforge.plantuml.asciiart.BasicCharAreaImpl.drawStringLR(BasicCharAreaImpl.java:126) net.sourceforge.plantuml.klimt.drawing.txt.UGraphicTxt.draw(UGraphicTxt.java:90) net.sourceforge.plantuml.klimt.drawing.AbstractUGraphicHorizontalLine.draw(AbstractUGraphicHorizontalLine.java:77) net.sourceforge.plantuml.klimt.creole.legacy.AtomText.drawU(AtomText.java:232) net.sourceforge.plantuml.klimt.creole.SheetBlock1.drawU(SheetBlock1.java:215) net.sourceforge.plantuml.klimt.creole.SheetBlock2.drawU(SheetBlock2.java:110) net.sourceforge.plantuml.gantt.draw.TaskDrawRegular.drawTitle(TaskDrawRegular.java:121) net.sourceforge.plantuml.gantt.GanttDiagramMainBlock.drawTasksTitle(GanttDiagramMainBlock.java:182) net.sourceforge.plantuml.gantt.GanttDiagramMainBlock.drawU(GanttDiagramMainBlock.java:119) net.sourceforge.plantuml.klimt.shape.TextBlockUtils$2.drawU(TextBlockUtils.java:155) net.sourceforge.plantuml.core.TextBlockExporter.exportTo(TextBlockExporter.java:177) net.sourceforge.plantuml.UgDiagram.exportDiagram(UgDiagram.java:93) net.sourceforge.plantuml.servlet.DiagramResponse.sendDiagram(DiagramResponse.java:159) net.sourceforge.plantuml.servlet.UmlDiagramService.doGet(UmlDiagramService.java:106) javax.servlet.http.HttpServlet.service(HttpServlet.java:529) javax.servlet.http.HttpServlet.service(HttpServlet.java:623) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:197) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:142) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:166) org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:142) org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:166) org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:88) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:481) org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:83) org.apache.catalina.valves.StuckThreadDetectionValve.invoke(StuckThreadDetectionValve.java:185) org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:72) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:398) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63) org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:935) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1831) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52) org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:973) org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:491) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63) java.base/java.lang.Thread.run(Thread.java:829) Diagram source: (Use http://zxing.org/w/decode.jspx to decode the qrcode)