The only thing I installed before this mod was Edit Orders. Once Super Orders was installed, the only change I've made was to upload the new super_data_sheet.php to.....
Uh oh....I just realized there are two of these files in different locations (in /admin and again in /admin/includes/languages/english)

and now I can't remember which directory I uploaded to. But I'll bet it's the wrong one - that's exactly the kind of thing that causes this kind of error according to the threads I've been reading tonight.
Let me go back and restore the originals to both locations and then I'll re-upload the new file that you posted in this thread.
For clarity, can you tell me which of those directories it should be installed in?
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