Android. ERROR_COULD_NOT_MOUNT while mounting complex ciphered obb file

Question

I develop Android app, which uses ciphered obb file. This obb file consists of 3 files (I created it with jobb tool). On the most devices all is ok, but on the three devices the

Answer 1

So, after all my investigations I can say. All I can to do is workaround. And I have created one file from the these 3 files by

copy /B file1+file2+file3 result_file.obb

And then I use this file as non-ciphered obb. After all this manipulations all works well.