used Sending funds address to receive bitcoins Is there any way to get bitcoins when i accidentally used Bitcoin Core's "send to address" to get them?

Blockchain.info shows that there is balance, but the client shows 0 BTC and dumpprivkey does not work either.
If dumpprivkey provides no private key, then your wallet does not have it. You are not the owner of that address, and those bitcoins are not yours.