Quote from: DelivMan on December 29, 2017, 12:55:10 PM

I have a processed number of blocks of 501568 (looks like thats up to date (?) )

That is accurate indeed.

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But still there is a pending total of +/- 2.8 BTC
I can try to move the private key to Electrum (thanks for the suggestion!) But i rather do it as last resort.
I prefer to understand what's going on.

I've had some unexpected results too after an upgrade of Bitcoin Core in the past: New install, new version of Bitcoin Core, weird Pending amount [SOLVED].
In my case it wasn't a real transaction going into my wallet.
If 16u1VqPgTnGrAXQreLFBbVoUkgaATeHXKA is part of your receiving addresses, it should show up after a rescan.

I got recommended this:

Code:

bitcoin-qt -zapwallettxes

Full description:

Code:

-zapwallettxes=
   Delete all wallet transactions and only recover those parts of the
   blockchain through -rescan on startup (1 = keep tx meta data e.g.
   account owner and payment request information, 2 = drop tx meta
   data)

I think a rescan is enough, if not, you can always still use zapwallettxes on your wallet. Make a backup first though!

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Can it have anything to do with to transactions i've send from my old wallet (which was with Qt on windows 7) to my new wallet (which is on Linux Mint with Bitcoin Core) ?
On the same evening i started with sending 0.0002 BTC to my new wallet, to see if public keys were correct etc. This transactions has also more than 6000 confirmations. And this transaction is now shown as available balance ! (i would rather have it the other way around Wink

first TX pending second available)

I can't tell you the exact cause, but I've seen wallet.dat files mess up before.

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Final question: can i start rescan from the debug window? Or if that's impossible how do i start a rescan from a linux terminal?

Just do it from a terminal:

Code:

bitcoin -rescan

I'm not sure if "bitcoin" is the default name, or that I created that simlink on my own. You may need to use this:

Code:

bitcoin-qt -rescan

This may take a while Tongue