This guy sent Nxt to himself. Yeah, it's not so surprised. Even I had the same error yesterday, I sent 3 Nxt to the project account from the same account when I wanted to send 3 Nxt to those who sent in.

Also, some guys wrote me to express appreciation and encourage to do this project. It's my pleasure to contribute to Nxt community through my efforts. As a cryptocurrency, I'd hope it's transferred in and out. For those users have never sent Nxt out, I provide this opportunity to experience the transaction of Nxt and can also earn some Nxt. Furthermore, if you have no transaction out, your account is only protected by 64-bit entropy and it might be possible that your account secret can be found with a brute-force attack in the near future or, with a collaborative effort of enough computation power, even now. Once there is a public key in the NXT block chain for your account, it is protected by 256-bit entropy, which currently is enough to prevent brute-force attacks (reference here). One of the direct way to get your public key is to do a simple transaction out, so this is again the opportunity for you to get get public key and make your account security and earn some Nxt at the same time.

Have fun.