not needed to sync a wallet to export private keys
incase u dont know whataddresshold coins u can export em all
a description is i think is part of answer 19 here
https://diamond-info.github.io/its the dumpwallet stuff
Thanks for your answer.
Also the command dumpwallet doesn't exist in v2.1.0.4. I found the command listaddressgroupings who returned me 4 addresses.
Then I dumpprivkey each one and receive 4 private keys who I imported in the new wallet core v3.
Is running fine and I have my transactions in the new wallet, also my DMD.
The problem if I calculate the sum of transactions between both wallet it miss about 1000DMD.
I don't know if there are the one my wallet minted. Maybe do you know another command that dumpwallet cause in your link the examples are for the new wallet.
Should I export transactions for every wallet then search for the missing ?
Thanks