Syntax error: end of file unexpected (expecting "then")

I have met the same problem. And the problem is the format of the file is "dos", but in linux shell requires "unix", so I install the "dos2unix"

$ sudo apt-get install dos2unix

or if you use emacs, you can do this:

C-x RET f unix

Good luck :)

1. The Unix directory separator is forward slash not backslash.
2. Does your editor on windows have an option to save files in "Unix" file format? The shell is seeing the word then^M with a carriage return on the end. If you don't have dos2unix then try running this command: sed -i 's/\r$//' filename