java.lang.IllegalStateException: net.sourceforge.plantuml.posimo.Cluster@384695b0 at net.sourceforge.plantuml.posimo.DotxMaker.printCluster(DotxMaker.java:77) at net.sourceforge.plantuml.posimo.DotxMaker.createDotString(DotxMaker.java:64) at net.sourceforge.plantuml.posimo.GraphvizSolverB.solve(GraphvizSolverB.java:93) at net.sourceforge.plantuml.dot.CucaDiagramTxtMaker.(CucaDiagramTxtMaker.java:120) at net.atmp.CucaDiagram.createFilesTxt(CucaDiagram.java:373) at net.atmp.CucaDiagram.exportDiagramInternal(CucaDiagram.java:397) at net.sourceforge.plantuml.UmlDiagram.exportDiagramNow(UmlDiagram.java:138) at net.sourceforge.plantuml.AbstractPSystem.exportDiagram(AbstractPSystem.java:207) at net.sourceforge.plantuml.servlet.DiagramResponse.sendDiagram(DiagramResponse.java:160) at net.sourceforge.plantuml.servlet.UmlDiagramService.doGet(UmlDiagramService.java:94) at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:717) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1644) at org.eclipse.jetty.websocket.server.WebSocketUpgradeFilter.doFilter(WebSocketUpgradeFilter.java:164) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1615) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:550) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:568) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:221) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1110) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:479) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:183) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1044) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:199) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:109) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.eclipse.jetty.server.Server.handle(Server.java:459) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:281) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:232) at org.eclipse.jetty.io.AbstractConnection$1.run(AbstractConnection.java:505) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:607) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:536) at java.base/java.lang.Thread.run(Thread.java:832)