If the coins did not make it into the block chain then try: repair wallet, then, if that does not work, salvage wallet and finally delete all roaming except wallet.dat and restart wallet which will re-build the chain. Your roaming has a chain where you tried sending. A new chain should only show what really happened in the chain. Good Luck. There is another command zapwallettxes=1 which rebuilds your wallet showing your address txes that took place in the chain but I don't think it is available in CAP
Hopefully others may be able to help more.
Thanks Woody for the ideas unfortunately nothing worked. Repair the wallet saw nothing wrong and rebuilding the the block chain and block index did not work. I guess the coins are lost unless there is a way to tell the wallet to unsend the coins or mark them as not sent, those coins are lost. Fortunately it is not my main wallet.