I stake a Cryptocurrency based of Peercoin on a Server since years. Multiple months ago this stopped because of the following error:
Coind: kernel.cpp:372: unsigned int GetStakeModifierChecksum(const CBlockIndex*): Assertion `pindex->pprev || pindex->GetBlockHash() == (!fTestNet ? hashGenesisBlock : hashGenesisBlockTestNet)' failed.
This Error often comes when your Blockchain is corrupted. The cause of my problem was an unexpected downtime.
To fix this:
- Stop the Daemon
- Backup the Folder of the Coin
- Delete everything except wallet.dat, peers.dat and *.conf
- Start the Daemon again (
/path/to/coin/src/Coind -daemon -datadir=/path/to/coin/folder/)
I also published a German blog post about compiling AltCoins.