ERROR: ReadBlockFromDisk: Errors in block header at CBlockDiskPos(nFile=0, nPos=8)

ERROR: ReadBlockFromDisk: Errors in block header at CBlockDiskPos(nFile=0, nPos=8)

For study and fun I try to create my own altcoin. I forked Litecoin, removed checkpoints, changed nTime, *pszTimestamp, noNce and hashed new hashes for genesis block in main net, testnet and regressiontest net. The hardcoded assertions goes OK but when I start the deamon

./src/cryptoind 

I get alwais the same result:

ERROR: ReadBlockFromDisk: Errors in block header at CBlockDiskPos(nFile=0, nPos=8) ... ActivateBestChainStep --> Failed!

Going deeper in the code the following statement always fails (main.cpp):

if (UintToArith256(hash) > bnTarget)

Seems like the genesis block does not respect the difficulty (PoW)

Someone faced the same issue? Thank you all

http://ift.tt/2BZZMkm