You are exporting a password protected key file from MultiBit classic... This actually encrypts the contents of the file, making it useless for what you're trying to achieve. It probably looks like this:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fiforce.co.nz%2Fi%2Fnk5wi2is.35q.png&t=663&c=FMxgTN0mlYKqRA)
You need to enter your wallet password at the top, and then leave the password field at the bottom empty... Select the "do not password protect export file" option:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fiforce.co.nz%2Fi%2F5h4ipcv3.k2l.png&t=663&c=z48VI_wYTp7Hcw)
Note: you don't want to copy the datetime stamp at the end of the private keys when trying to import them into Bitcoin ABC...
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
This will create a plaintext version of the export file which you will find then contains the private keys in the correct "WIF" format... Ie. You'll see keys beginning with a "K" or "L"... Like this:
![](https://ip.bitcointalk.org/?u=http%3A%2F%2Fiforce.co.nz%2Fi%2Fg43qfhpr.vun.png&t=663&c=mp-3e1rSrqwLBQ)