Hi. I TBCME 5.1.4 (for Mac) is crashing for me when I attempt to add a 
restriction to a class via the UI (via the 'Create restriction' pulldown 
menu item under rdfs:subClassOf). I tried to enter the restriction by hand 
in the code, but TBC does not seem to parse/process/accept that code. The 
trace is below. Thanks for any help.  Rich


!ENTRY org.topbraidcomposer.core 4 0 2016-09-12 14:54:40.690
!MESSAGE Failed to execute operation
!STACK 0
java.lang.reflect.InvocationTargetException
    at 
org.topbraid.core.change.AbstractChangeEngine.execute(AbstractChangeEngine.java:286)
    at 
org.topbraidcomposer.core.change.TBCChangeEngine.access$0(TBCChangeEngine.java:1)
    at 
org.topbraidcomposer.core.change.TBCChangeEngine$2.run(TBCChangeEngine.java:155)
    at 
org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
Caused by: org.eclipse.core.commands.ExecutionException: While executing 
the operation, an exception occurred
    at 
org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:524)
    at 
org.topbraid.core.change.AbstractChangeEngine.execute(AbstractChangeEngine.java:272)
    ... 3 more
Caused by: java.lang.IllegalStateException: we failed to create the object: 
java.lang.IllegalStateException: objectProvider returned null
    at 
org.topbraid.change.AddStatementChange.execute(AddStatementChange.java:65)
    at 
org.topbraid.core.change.ChangeOperation.execute(ChangeOperation.java:105)
    at 
org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:516)
    ... 4 more
Root exception:
org.eclipse.core.commands.ExecutionException: While executing the 
operation, an exception occurred
    at 
org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:524)
    at 
org.topbraid.core.change.AbstractChangeEngine.execute(AbstractChangeEngine.java:272)
    at 
org.topbraidcomposer.core.change.TBCChangeEngine.access$0(TBCChangeEngine.java:1)
    at 
org.topbraidcomposer.core.change.TBCChangeEngine$2.run(TBCChangeEngine.java:155)
    at 
org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:119)
Caused by: java.lang.IllegalStateException: we failed to create the object: 
java.lang.IllegalStateException: objectProvider returned null
    at 
org.topbraid.change.AddStatementChange.execute(AddStatementChange.java:65)
    at 
org.topbraid.core.change.ChangeOperation.execute(ChangeOperation.java:105)
    at 
org.eclipse.core.commands.operations.DefaultOperationHistory.execute(DefaultOperationHistory.java:516)
    ... 4 more

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