Why would feature attributes be missing when using a reader? On inspection features such as fme_basename or fme_dataset are present in table but with a value 'missing'??
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Hi @cbrown
Could you share the print or the Workspace template?
Thanks,
Danilo
Do you have actual attributes in your input data called "fme_basename" and "fme_dataset"?
Most likely you have exposed them with the AttributeExposer. If so, try exposing them through the Format Attributes tab in the reader feature type, rather than using the AttributeExposer.
@takashi
Many thanks! That was the problem 
They weren't checked to expose in the Feature Type Format Attributes. All good.