WhiteDragon coffin dodger at work, I managed to be fully loaded after a three day tedious wait all the block data for the /monero-gui-v0.17.1.9 Not pain free with a couple of restarts, all from scratch. On shutting down the wallet had to kill the background demon with a Ctrl C, otherwise the PC was more or less locked out for normal work. On restarting the /monero-gui-v0.17.1.9/monero-wallet-gui it took a while for the syncing to restart and in the lower left of the wallet I have:-
Wallet is synchronised Daemon is synchronised(87656)
then it flips to
Waiting for daemon to sync Daemon blocks remaining: 2224076
The error reports are E Blocks start before blockchain offset: 0 2265000 E !m_blockchain.is_in_bounds(current_index). THROW EXCEPTION: error::out_of_hashchain_bounds_error
Seems like it is trying to download the whole damned data in full again - time to pull the plug! Thanks for any help/pointers -> WhiteDragon