Qt version 4.8.4.

[tomsw6]

Catching up...Processed 0 of 375438 (estimated blocks)....Last generated block was generated 350 weeks ago.
Qt version 4.8.4.
Used to load very long time until one day I got msg that either main or something block failed to load and now take seconds to load but does not process any blocks still on 0.
Can I back up wallet if I have 0.61188477 unconfirmed coins or will I loose it as unconfirmed.
I would appreciate help or at least to point me in right direction.
i take it simple reinstalling with latest version of Qt will not get my money back? 
Thx in advance.

[unholycactus]

Back up your wallet.

No, your coins won't be lost. If you clean install the newest version of Bitcoin core (which is something I suggest doing), you will still control your funds assuming you have the right wallet.dat

The funds appear as unconfirmed because your wallet client doesn't have the rest of the blockchain i.e. it's missing transactions.

[tomsw6]

Back up your wallet.

No, your coins won't be lost. If you clean install the newest version of Bitcoin core (which is something I suggest doing), you will still control your funds assuming you have the right wallet.dat

The funds appear as unconfirmed because your wallet client doesn't have the rest of the blockchain i.e. it's missing transactions.

Thanx very much for fast reply, you've mentioned I will have a control of my funds assuming I have the right wallet.dat(how do I make sure of that?)
 

[unholycactus]

First, I'll mention you should use the File -> Backup wallet feature or copy the current wallet.dat you have located at (assuming windows 7)
C:\Users\YourUserName\Appdata\Roaming\Bitcoin

Keep this file and reinstall everything.

When you're done reinstalling, you can copy over the file you saved to your new installation folder (this should overwrite the new wallet.dat).

You can then use

Code:

bitcoin-qt rescan

in the command line interface so that the client acknowledges you have a new wallet file.

[shorena]

-snip-
When you're done reinstalling, you can copy over the file you saved to your new installation folder (this should overwrite the new wallet.dat).

You can then use

Code:

bitcoin-qt rescan

in the command line interface so that the client acknowledges you have a new wallet file.

You dont need to, it detects that the file is different and does this by itself.

[tomsw6]

I have backed up wallet, I run os yosemite on macbook pro.

[tomsw6]

i have re-installed it to latest version showing total btc 0.0000, how do i use old back up to get coins back to my wallet?
i get same message 0 out of plus no block source avail, 12 active connections.
thx.

[shorena]

i have re-installed it to latest version showing total btc 0.0000, how do i use old back up to get coins back to my wallet?
i get same message 0 out of plus no block source avail, 12 active connections.
thx

#1 close bitcoin core
#2 wait till its closed entirely
#3 goto the data directory[1]
#4 replace wallet.dat with your backup
#5 start bitcoin core.

[1] https://en.bitcoin.it/wiki/Data_directory#Mac

[tomsw6]

update:
debug.log 2015-09-23 07:11:16 receive version message: /getaddr.bitnodes.io:0.1/: version 70002, blocks=375735, us=82.34.75.229:8333, peer=36, 2015-09-23 07:12:25 ERROR: AcceptBlockHeader: block is marked invalid 2015-09-23 07:12:25 ERROR: invalid header received 2015-09-23 07:12:25 ProcessMessages(headers, 162003 bytes) FAILED peer=13, lots of 2015-09-23 07:13:07 ERROR: AcceptToMemoryPool: non-final at the end, it does show previous transaction now after replacing wallet.dat with back up, maybe not all lost, still no blocks processed, synchronizing at 13 active nodes

[shorena]

update:

Code:

debug.log 
2015-09-23 07:11:16 receive version message: /getaddr.bitnodes.io:0.1/: version 70002, blocks=375735, us=82.34.75.229:8333, peer=36, 
2015-09-23 07:12:25 ERROR: AcceptBlockHeader: block is marked invalid 
2015-09-23 07:12:25 ERROR: invalid header received 
2015-09-23 07:12:25 ProcessMessages(headers, 162003 bytes) FAILED peer=13, lots of 
2015-09-23 07:13:07 ERROR: AcceptToMemoryPool: non-final 

at the end, it does show previous transaction now after replacing wallet.dat with back up, maybe not all lost, still no blocks processed, synchronizing at 13 active nodes

Formatting helps.

I dont see anything wrong. The errors you see a pretty normal during sync.

[tomsw6]

after shut down back to no block avail doesn't show recent transaction.
how do i do formatting
log after restart:
 connection refused (61)
2015-09-23 08:05:02 ERROR: AcceptToMemoryPool: non-final
2015-09-23 08:05:03 receive version message: /Satoshi:0.11.0/: version 70002, blocks=375738, us=82.34.75.229:58532, peer=7
2015-09-23 08:05:03 Added time data, samples 7, offset -164 (-2 minutes)
2015-09-23 08:05:03 nTimeOffset = +0  (+0 minutes)
2015-09-23 08:05:03 ERROR: AcceptToMemoryPool: non-final
2015-09-23 08:05:07 ERROR: AcceptToMemoryPool: non-final
2015-09-23 08:05:09 receive version message: /getaddr.bitnodes.io:0.1/: version 70002, blocks=375737, us=82.34.75.229:8333, peer=8
2015-09-23 08:05:09 Added time data, samples 8, offset +0 (+0 minutes)
2015-09-23 08:05:13 receive version message: /Satoshi:0.9.3/: version 70002, blocks=0, us=82.34.75.229:8333, peer=9
2015-09-23 08:05:13 Added time data, samples 9, offset +0 (+0 minutes)
2015-09-23 08:05:13 nTimeOffset = +0  (+0 minutes)

[shorena]

after shut down back to no block avail doesn't show recent transaction.

Is it synced yet?

how do i do formatting

Use the # symbol from the menu above the textbox.

log after restart:

Code:

 connection refused (61)
2015-09-23 08:05:02 ERROR: AcceptToMemoryPool: non-final
2015-09-23 08:05:03 receive version message: /Satoshi:0.11.0/: version 70002, blocks=375738, us=82.34.75.229:58532, peer=7
2015-09-23 08:05:03 Added time data, samples 7, offset -164 (-2 minutes)
2015-09-23 08:05:03 nTimeOffset = +0  (+0 minutes)
2015-09-23 08:05:03 ERROR: AcceptToMemoryPool: non-final
2015-09-23 08:05:07 ERROR: AcceptToMemoryPool: non-final
2015-09-23 08:05:09 receive version message: /getaddr.bitnodes.io:0.1/: version 70002, blocks=375737, us=82.34.75.229:8333, peer=8
2015-09-23 08:05:09 Added time data, samples 8, offset +0 (+0 minutes)
2015-09-23 08:05:13 receive version message: /Satoshi:0.9.3/: version 70002, blocks=0, us=82.34.75.229:8333, peer=9
2015-09-23 08:05:13 Added time data, samples 9, offset +0 (+0 minutes)
2015-09-23 08:05:13 nTimeOffset = +0  (+0 minutes)

[tomsw6]

still no block source available, 0 blocks processed, now i tried to reinstall  it and crashes every time.