> For the complete documentation index, see [llms.txt](https://docs.win.win/twins/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.win.win/twins/english-documentation/twins-wallet/blockchain-health-check.md).
# Blockchain health check
**1. Check the block count from the local wallet:**
Compare it to the one of the blockchain explorer @ [https://chain.review/](https://explorer.win.win/)
You can also compare it to the second explorer @
**The current block must match.**\
If they don’t match, here’s what to do:
* Check the version of your wallet at Tools > Information and make sure it is the latest one available at .
* Next, close the wallet and delete the following .dat files: **peers.dat**, **banlist.dat**, **mnpayments.dat**.
* If you are using Windows you will find the files in the "%appdata%/TWINS" folder.
* If you are using Linux you will find the files in the /YourUserName/.twins folder
* If you are using a Mac, you will find these files in the /Users/YourUserName/Library/Application Support/TWINS folder
* Delete the directories **blocks** and **chainstate**.
* Then do a full resync by restarting the wallet.
\- The wallet will find new peer connections. Go to Tools > Peers list and see if you have any peers running with an older version. If you do, right-click on them and choose "Ban Node for 1 year":
**2. Check the blockcount on your masternode wallets on your VPS (remote wallet):**
For those using the Nodemaster script:
*twins-cli -conf=/etc/masternodes/twins\_nX.conf getblockcount*
For the normal script:
*./twins-cli getblockcount*
And compare it to what explorer says. If they match you are good. If they don’t, you’ll need to do a full resync of your MN with the TWINS blockchain as follows:
If you are using the Nodemaster script:
A. Delete the blockchain folders called “blocks” and “chainstate”. Located in /var/lib/masternodes/twinsX if you are running the nodemaster script (X is the number of your masternode)
B. Delete the .dat files **banlist.dat, mnpayment.dat, peers.dat** located in the same folder.
Then do a full a resync by stopping and starting the twins daemon:
systemctl daemon-reload \
systemctl enable twins\_nX \
systemctl restart twins\_nX
If you are not running the nodemaster script, the files that must be deleted are located in the /YourUserName/.twins folder and the command to stop and restart the twins daemon should be:
./twins-cli stop \
./twinsd *or* ./twinsd -daemon
**Another way to verify that you are on the right chain is to run:**
“getblockhash \” from the local wallet in debug console and “twins-cli -conf=/etc/masternodes/twins\_nX.conf getblockhash \” from the MN.
Then see if the hash matches with what the TWINS explorer says.