_ Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top up vote 1 down vote favorite I hadn't started/used my Bitcoin client for ages.Now, whenever I start the client, it is downloading block 135407 and does not progress past it.What can I do?blockchain bitcoin-core synchronization up vote 3 down vote Okay, based on the comments I have tried a couple of things but in the end only the following worked: Close Bitcoin client Backup files from %APPDATA%\Bitcoin Optional:Download Block chains from: http://sourceforge.net/projects/bitcoin/files/Bitcoin/blockchain/ to prevent lengthy initial download (Warning: the link advises against doing this if you have transactions in your wallet).Start Bitcoin client with the -rescan option from command line.After that the client started downloading blockchains again.This worked for me.Not sure if this will work for everyone.

up vote 1 down vote I had a similar problem, but the -rescan option didn’t help.In my case, there were a lot of lines referring to orphan blocks in my debug.log file (not 100 % sure it’s related but it may): 2014-08-18 20:52:57 ProcessBlock: ORPHAN BLOCK 0, prev=00000000000000001132f6ac32387e51960e3154b2ad4420bdeb64d77999388f 2014-08-18 20:54:00 ProcessBlock: ORPHAN BLOCK 1, prev=00000000000000000e9926124cabed78be0ae8bab22fb20acc643e94749120f8 2014-08-18 20:56:37 ProcessBlock: ORPHAN BLOCK 2, prev=00000000000000001b3f790fc107051c17702d305b08a3ae6325f40ecf44eae9 ... Finally, I tried to restart the client with the -reindex option which fixed my problem (but took 100 % of my CPU usage for several hours while reprocessing the blockchain).So if the rescan option don’t work, don’t give up, try the reindex option!up vote down vote You should update your bitcoin software.Old bitcoin versions are not supported.Look here: /index.php?topic=55852.0 Your Answer Sign up or log in Sign up using Google Sign up using Email and Password Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged blockchain bitcoin-core synchronization or ask your own question.Comments Closed "Large valid fork found" , stuck at block 322082 Sign up for free to join this conversation on GitHub.Already have an account?Sign in to comment You signed in with another tab or window.Reload to refresh your session.You signed out in another tab or window.Over the past year, I have been hanging out on various Bitcoin forums, the most frequented being Bitcointalk, and helping people out with various tech support issues with Bitcoin Core.I decided to compile the most frequent issues and troubleshooting tips into this post here, partially to help people troubleshoot their install, and partially to help me not have to keep posting the same thing over and over again.This document will continue to grow as I hear of more and more troubleshooting issues.In Bitcoin Core, it is fairly easy to remove a transaction from your wallet so that you can resend the transaction with a higher fee.

There are two methods to do so, the abandontransaction command and the -zapwallettxes startup option.To use the abandontransaction RPC, you first must be running Bitcoin Core 0.12 or later.Then open up the debug console and use the command where is the transaction id of your stuck transaction.Do this for every stuck transaction.If the command is successful, there will be no error and no output.bitcoin pool algorithmIf abandontransaction did not work or if you do not have Bitcoin Core 0.12 or later, then you can use the -zapwallettxes startup option.bitcoin bubble business insiderTo do so, just follow the instrucionts to start Bitcoin Core with an option where the option you want to use is -zapwallettxes.foxconn bitcoin

If your wallet balance is incorrect, a number of things could have gone wrong.First double check that you are fully synced.Check a block explorer to see the latest block height.Next open Bitcoin Core and hover your mouse over the check mark at the bottom right hand corner.It should pop up with a little info box that says how many blocks Bitcoin Core has processed.This number should match the latest block height in the block explorer.litecoin price tickerIf it does not, wait for Bitcoin Core to finish syncing.bitcoin haendlerIf you are synced, try starting Bitcoin Core with the -rescan option.best litecoin gpu 2014If that does not fix the problem, next check your receiving addresses at File > Receiving addresses.Make sure that you are not missing any addresses.If you are, check whether the addresses you are missing are still in your wallet.

If the address is missing from your wallet, then you will have to restore from a recent backup in order to recover it.Otherwise there is nothing that can be done.If your wallet is empty and you see no familiar transactions or addresses, it is likely that the wallet file Bitcoin Core is currently using is not your actual wallet.If you had recently pressed the Reset Options button in Settings > Options, then your data directory may have been reverted to the default.To check, go to Help > Debug Window and go to the Information tab.In the field labeled Datadir, the path to your data directory will be listed.If that is not what you expect (custom if it was set, or default if not), then this is why your wallet is empty.If you had a custom data directory, you must start Bitcoin Core with the -datadir= option where is the path to your data directory.To open the debug console, go to Help > Debug Window in Bitcoin Core.In the new window that pops up, click on the Console tab.This is the debug console.

You type the commands in the small box at the bottom of the window.The command help will give you a list of all commands available.Typing help , where is one of the commands, will give you the usage for that command.The debug window will let you know if something was successful through the output of each command.Most of the commands will have an output.If the output is in black text, then your command was successfully run.If the output is in red text and has some sort of error code, then the command failed and there was an error.The commands also take arguments in JSON format, so entering the commands with proper JSON format and escaping is essential.Starting Bitcoin Core with startup options can be very useful.The method of doing so is dependent on your Operating System Right click the shortcut that you use for starting Bitcoin Core.Click on Properties in that menu.In the Properties window, go to the box labeled Target.Click the box and move your cursor all the way to the right, past what is already in there.

Then just type the options you want, making sure that there is a space between what is already in the box and your option, and a space between each option.Then just click OK and double click the shortcut to start Bitcoin Core.When Bitcoin Core is fully started, you can repeat this process and remove the options that you added.Open the terminal in Linux.If you did not install Bitcoin Core and are just running the binary, navigate to the directory you have the bitcoin-qt file in.Then type where are your startup options.Just make sure to have a space between each option.Press enter and Bitcoin Core will start with those options.Disclaimer: I don’t have a Mac so I am not 100% sure that this works, but it should.Open the Mac terminal.Open the debug console and use the command where

is the Bitcoin address whose private key you want to check is in the wallet.If the command was successful, it will print the private key to the console.DO NOT SHARE THE PRIVATE KEY WITH ANYONE.

This key should begin with a ‘5’, ‘K’, or ‘L’.If it does not, it is not a private key.If the command failed with an error, the private key to the address is not in your wallet.The debug.log file is a log file that is very useful for troubleshooting.It does not leak any information about your private keys so your Bitcoin is always safe.To get the debug.log file, open Bitcoin Core and go to Help > Debug Window and go to the Information tab.Near the bottom right hand corner of the window is a button labeled Open with Debug log file.Click this to access the file.Now you can save the file elsewhere or copy the contents to send to someone.If Bitcoin Core is unable to open for some reason, go to the data directory.If you set a custom data directory on first startup or with the --datadir option, then you must go there.The default locations are described at https://en.bitcoin.it/wiki/Data_directory#Default_Location.Once you are at the data directory, find the file named debug.log.This is the file we are looking for.