Yes, I think this is a bug already occured. See this thread: *click*
Maybe this is related, I get for the ExampleSet: "ExampleSource (2): The ID attribute 'item_id' is defined with a nominal value type but the possible values are not defined ..."
This is strange because I defined 'item_id' as string and not nominal:
I dont think so. Valuetype=string implies nominal. Normally the ExampleSource-operator expects that all possible values for the nominal attribute are documented in the aml-file. Example:
name = "Outlook"
sourcecol = "1"
valuetype = "nominal">
But this has (as far as I see) nothing to do with the bug.
Hope the workaround in the mentioned thread above is helping you, too