I downloaded the new Mac wallet: v0.8.6.4-Patch 0 Alpha, and when i am syncing the blockchain, I keep getting an issue on block 650000. I attempted to download the blockchain fresh, and got the same error. I then used the bootstrap file to import the blocks, and got the same error. Anyone know how to fix this error?
Checking for Velocity on block 650000: Velocity is currently Enabled
DENIED: Block timestamp is not logical
ERROR: AcceptBlock() : Velocity rejected block 650000, required parameters not met
ERROR: ProcessBlock() : AcceptBlock FAILED
Any help would be appreciated. I read back a few pages, but could not figure this out. Should i delete everything and start fresh (And back up my wallet.dat of course)?
The second method below worked for me.
If you are having trouble syncing or your block-height is not correct this is a simple solution.
Step 1. Hit Win+R, Type "%Appdata%"
Step 2. find your ESP folder, go into it, and rename wallet.dat to walletbAK.dat
Step 3. go back in the appdata folder and rename the ESP folder to ESPbak
Step 4. Download latest client (available on the ANN) make sure it is Espers v0.8.5.4-Patch 6
Step 5. run client, allow it to fully sync, add the nodes that you wish to add Etc.
Step 6. after verifying that you are on the correct chain with proper block-height, Close the application go back into the ESPbak Appdata folder and copy the walletbak.dat into the new ESP folder that was created and rename to wallet.dat
Run the application and allow it to fully sync again. (this is a lengthy process but should work)
or you could try the following using the Client Debug Console.
Step 1. Write down your addresses you have in your wallet (at least the ones with balance)
Step 2. Run the "dumpprivkey
" for each ESP address and copy the private key for each address
Step 3. Stop the wallet software and go to the appdata folder where you find wallet.dat and rename this file to wallet.old
Step 4. Start the wallet software (a new wallet.dat will be generated)
Step 5. Run the "importprivkey " for each ESP address you exported private keys for in step 2 (it takes some time for each private key)
Step 6. If you find that all balance is restored you are done and can start working with this wallet, if something looks very wrong you can stop wallet and rename back the original wallet.dat
Another lengthy process but this too should work
I just tried those steps and unfortunately it is not working. After none of the steps working and it still failing on 650000, I cleared my computer completely of the mac ESP app and app data (Still have my wallet and privkey). I then downloaded fresh, and it still fails on block 650000. Here is what it says in my debug.log:
Checking for Velocity on block 649999: Velocity is currently disabled
SetBestChain: new best=28989e8c395c5d42b3f022df3476e17c4717eedccb9211c1b31d69cab9dd844e height=649999 trust=428128595079413800542228 blocktrust=595155862430624481 date=02/27/17 05:43:12
ProcessBlock: ACCEPTED
Checking for Velocity on block 650000: Velocity is currently Enabled
DENIED: Block timestamp is not logical
ERROR: AcceptBlock() : Velocity rejected block 650000, required parameters not met
ERROR: ProcessBlock() : AcceptBlock FAILED
I prefeer to use poswallet 
