Unable to create new profiles via the CLI

Running/profile=exampleprofile:add() from the CLI gives an error message:
"outcome" => "failed",
"failure-description" =>

{"domain-failure-description" => "Failed to persist configuration change: org.jboss.as.controller.persistence.ConfigurationPersistenceException: Failed to marshal configuration"}

,
"rolled-back" => true

[Host Controller] Caused by: java.lang.IllegalArgumentException
[Host Controller] at org.jboss.dmr.ModelValue.getKeys(ModelValue.java:124) [jboss-dmr-1.0.0.Final.jar:1.0.0.Final]
[Host Controller] at org.jboss.dmr.ModelNode.keys(ModelNode.java:1085) [jboss-dmr-1.0.0.Final.jar:1.0.0.Final]
[Host Controller] at org.jboss.as.controller.parsing.DomainXml.writeProfile(DomainXml.java:502) [jboss-as-controller-7.1.0.Alpha1-SNAPSHOT.jar:7.1.0.Alpha1-SNAPSHOT]