Turn on -show_err on the target line of your Rome shortcut and it might give you an error message telling you where the error is.
Keep in mind that if you change EDB there are many other files that make use of the information there and need to be changed if changes are made to EDB. My guess is you haven't changed the references to the farms in any of descr_stat, export_descr_character_traits, export_descr_ancillaries, export_descr_advice, and probably a few other files I can't remember. Also if you changed the name of any of the building level then you need to rename all the pictures that go with the building levels that had their name changed or provide new name mapping in descru_ui_buildings.
EDIT: The easiest way to find which files you'll need to change is to do a search on your data directory for files which have the original name of the buiding as content, then one by one open those files and update the name. This of course won't help with the image issue if that came up.
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