Maximum file size for .txt asset? Unity crashes when importing large text file

Questions & Answers
1

Is there a maximum file size when importing text assets?

Unity 5.4.0 crashes every time I try to import the 1.2GB text file needed for my project, but works fine for a smaller version (85MB).

When I relaunch Unity, there is a console comment: “A default asset was created for ‘Assets/particles.txt’ because the asset importer crashed on it last time.
You can select the asset and use the ‘Assets → Reimport’ menu command to try importing it again, or you can replace the asset and it will auto import again.”

I have tried reimporting the asset as suggested (Unity crashes again), deleting the default asset created and importing again (Unity crashes), creating a new project and importing there (Unity crashes), restarting the computer and trying all of the above (Unity still crashes). I have opened the file in a text editor and can’t see anything obviously wrong with it, although since it has 16 million lines I haven’t exactly checked it all…

I have submitted a bug report.

2

I’m not quite sure what your doing that you need a 1.2GB txt file… but Unity does tend to crash when you try importing things that pass a certain size. Such as importing to large of a movie texture. Really the only way I can see of fixing this is A. Try and reduce your fize size somehow or B. Break up your file into smaller separate
txt’s.

3

You don’t need to import your .txt files to project/assets. You can use Application.persistentDataPath folder to store text/data files and you can read/use them with .NET StreamReader or your custom file reader.