Huh?? never happend before... reinstalled core wallet and tried one more time but same error "Signed Transaction Failed" press Ok "transaction creation failed" how to fix this i know something is wrong with wallet.dat but not sure how to fix it...
We're gonna need more info than this.Are you using the GUI or signing through the RPC?
Is your wallet fully synced? Are you sure you're signing inputs for which you have the private keys in your wallet.dat, yadayayada...?
If you think something is wrong with your wallet.dat, it might be smart to make a backup first, and go from there. (https://bitcoincore.org/en/doc/0.16.0/rpc/wallet/dumpwallet/)
