If this happens just for one file
Are there any weird unicode characters in the file that might mess it up?
This would be likelier to happen in CSVs than in LOG files.
If this happens for all files
Try it out in a different browser.
For me, was getting consistent errors for different files, and different file types.
When I stopped using Safari and started using Firefox, it was fixed.
Safari has much stricter security than most other browsers, which can get in the way of some web-apps functionalities.
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I have the exact same when uploading a .CSV file through the initial "Add Data" screen on the web interface.
There are probably weird characters in my CSV, but I've cleaned all quotes, magic quotes, and other characters that might be confusijng, but it opens fine (with correct number of columns) in Excel and Numbers.app.
Any thoughts?
Cheers,
Ralph
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