Can’t Copy PDFs and .gif images

Hello,

Thank you for developing this plugin and its documentation — it is awesome!

I am having trouble migrating what I think is a single .gif image and all PDFs from the Joomla install.

[ERROR] Can’t copy https://hub.americanorchestras.org/images/stories/symphony_magazine/ratecard_2009.pdf
[ERROR] Can’t copy
https://hub.americanorchestras.org/images/stories/symphony_magazine/Pops_Listing_09.pdf

[ERROR] Can’t copy https://hub.americanorchestras.org/mambots/editors/jce/jscripts/tiny_mce/plugins/filemanager/images/ext/pdf_small.gif

I realized that the PDFs seem to live on the primary domain americanorchestras.org not hub.americanorchestras.org. Is it possible to grab those documents.

Should I use the “Import external media” checkbox?
Should I finish the import then run the whole thing again using https://americanorchestras.org in the URL to live site field (though it is not the Joomla install)

I would very much appreciate your insight, thank you!