1.my steps are I emptied my summercoinv2 folder and only keep my latest wallet.dat file
2.I extract the 612mb blockchain data to the summercoinv2 folder
3. I extract the latest download version of wallet in summercoinv2 folder
4. Then I run the nav wallet
Fixed
others on other forums just delete the BLKindex.dat. ( never delete your wallet.dat file )
Myself I can experiment strongly as I always have many copies of my wallet. dat file because that is where my investment and hardwork is inside the wallet.dat file
Hopefully this above fixes your issue.
why is this error happening? i unzipped the blockchain in to roaming/summercoinv2 did i something wrong?
so dailly backup is important? what if i skip 1 week then backup do i loose coin if i do not dailly backup?
if you do not do any transaction, it is not important to make backups every day..you did well for blockchain