The undo of creating a message with a gate throws an exception:
Caused by: java.lang.NullPointerException
at org.eclipse.papyrus.uml.service.types.command.ConfigureMessageEventCommand.doUndo(ConfigureMessageEventCommand.java:357)
at org.eclipse.emf.workspace.AbstractEMFOperation.undo(AbstractEMFOperation.java:370)
... 81 more
The undo of creating a message with a gate throws an exception:
Caused by: java.lang.NullPointerException at org.eclipse.papyrus.uml.service.types.command.ConfigureMessageEventCommand.doUndo(ConfigureMessageEventCommand.java:357) at org.eclipse.emf.workspace.AbstractEMFOperation.undo(AbstractEMFOperation.java:370) ... 81 more