BOD Publish for Debug fails without error message

I have a custom iBO design in Business Object Designer.  It Compiles successfully, but when I click Publish for Debugging, it fails with no messages or errors.  Does anyone know what might be the cause?

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I have seen errors with

I have seen errors with publishing business objects when I had impersonation turned on in my web.config. But it would usually give me an error message at least.

Are you able to publish out-of-the-box iMIS business objects?

Thanks for your reply

Thanks for your reply.  It seems impersonation is off because "<identity" does not appear in Web.config, and impersonation is off by default.  I can Publish OOTB (out-of-the-box) business objects, but Publish for Debug fails with no Messages or Errors just like the custom business object.