Start exception

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I'm tryin to deploy a project but in the last step it throws an exception: runtime.start() should not throw anything other than AdminException! at lt.execute(SourceFile:62) at com.mendix.m2ee.server.handler.AdminHandler.handle(AdminHandler.java:84) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113) at org.eclipse.jetty.server.Server.handle(Server.java:334) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:559) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:992) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:550) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:203) at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:406) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:462) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436) at java.lang.Thread.run(Thread.java:619) Caused by: Illegal group reference at java.util.regex.Matcher.appendReplacement(Matcher.java:713) at ey.a(SourceFile:1485) at ey.a(SourceFile:1439) at ey.a(SourceFile:1427) at iX.c(SourceFile:152) at com.mendix.core.MxRuntime.G(SourceFile:451) at com.mendix.core.MxRuntime.a(SourceFile:221) at lt.execute(SourceFile:54) at com.mendix.m2ee.server.handler.AdminHandler.handle(AdminHandler.java:84) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113) at org.eclipse.jetty.server.Server.handle(Server.java:334) at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:559) at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:992) at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:550) at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:203) at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:406) at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:462) at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436) at java.lang.Thread.run(Thread.java:619) What does this mean, we have nothing changed in the project since yesterday. Yesterday I deployed without any errors. It's a multideveloper project and the same issue is occuring on more than 1 client.
asked
2 answers
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Please submit a ticket in our support portal for this. This error could be related to database structure validation, so if possible, could you include the data database as well (in lieu of the modeler database) ?

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We've found the attribute which has caused this error. We've copy & pasted this attribute in the domain model, so we think that something went wrong during the copy action. After removing and adding the attribute it worked.

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