Hi guys,
I mined some BTC in 2011.
Then I did nothing withem beside doing a backup of wallet.dat and uninstall the bitcoin client.
Now after years i reinstalled bitcoin core client, download the whole keychain and replace the wallet.dat (2017) with my backed up one (2011).
When I start the client i get an error: "Ein schwerer Fehler ist aufgetreten. Bitcoin kann nicht stabil weiter ausgeführt werden und wird beendet"
Then I run the bitcoin core client again with -reindex -research parameter...it took a while...and then I get displayes there are no BTC in the walltet but also no transactions.
After run it without -reindex -research I get the error again
I tried a reinstall of the client but nothing changed.
Do you know any help?
Is it save to upload the wallet to blockchain.info?
If i upload it to blockchain.info the he hoster of the webseite have access to my wallet, haven't he?