If you have the HD seed you should be able to recover the wallet by importing it into supported wallets like Electrum but how did you get the HD seed? Since BitcoinQT/Bitcoin core doesn't generate a seed I'm sure it was not from this wallet.
It's the "
HDSeed" of Bitcoin Core (
non-descriptor) wallet files which is exported in WIF format.
It cannot be imported to Electrum even if it's converted to (
xprv) master private key since it doesn't support hardened address derivation path.
Another one with bitcoin-qt encryption
then I reverted to the original,
Your original HDSeed's keystore was flushed with the wallet encryption, then if you generated new addresses to receive those missing transactions, then that's the issue.
Encrypting the wallet file will trigger it to set a new HDSeed; so after reverting to the original, you essentially removed the new HDSeed where the new addresses are derived from.
In this case, the solution is to find a backup of that encrypted wallet file.
I don't have a backup of the file from before the .dat file was modified
Have you checked whether your OS automatically make backup for your wallet.dat file? For example, Windows OS have "File versioning" feature which enabled by default.
What is the problem ? problematic ?
Earlier you mentioned "then I reverted to the original". Without knowing what exaclty you did, i would speculate you failed to revert modification you made.
You reason but, I saw a wiki, the encrypted wallet does not modify Hdseed! It's true / or false ? (more below)
I modified a letter, to put it back in its place, it's a test!
I just changed the creation date of my wallet
(here) If false, :
if I have a backup or a "pywallet recovery" or a dumpwallet of my file, before encryption, it may seem stupid, "BUT HOW TO PROCEED"? Please !?
I wasn't very "in the know", when I started this recovery, I didn't have the blockchain... I thought it would be easier but this log once again showed me that it wasn't!
I had to be more careful, that's it...
but here I am listening...?!
an idea, ? I have to do what ? If it's too old and recently modified, could that mean that's the problem?
I modified it a long time ago now... 1 time dump, 2 times modify, and tree times encrypt, but no coins... after import dump ??
what I do import ?